CN114965170A - Rheological test method for wood-plastic composite material with ultrahigh biomass fiber content and application thereof - Google Patents

Abstract

The invention discloses a rheological test method for a wood-plastic composite material with an ultra-high biomass fiber content, comprising: S1, compressing the biomass fiber and a thermoplastic polymer matrix into tablets respectively; S2, compressing the tableted biomass fiber A Layer with thermoplastic polymer matrix B according to the combination of mass ratio; S3, put the wood-plastic composite material with ultra-high wood fiber content obtained after superimposed and combined tableting into a rheometer to test rheological properties. By adopting the stress control method, the present invention puts the biomass fiber tablet A and the thermoplastic polymer matrix tablet B into the rotational rheometer in a superimposed manner for testing, which can solve the problem that the traditional rheological testing method cannot obtain accurate ultra-high biomass The problem of rheological property data of fiber content wood-plastic composites provides guidance for the development and preparation of ultra-high biomass fiber content wood-plastic composite materials, and solves technical problems such as difficulty in feeding ultra-high biomass fibers and uneven dispersion.

Description

Rheological test method of wood-plastic composites with ultra-high biomass fiber content and its application

technical field

The invention relates to a wood-plastic composite material with an ultra-high biomass fiber content, in particular to a rheological test method for a wood-plastic composite material with an ultra-high biomass fiber content and its application.

Background technique

As a green and environmentally friendly composite material, wood-plastic composite material mainly uses thermoplastic polymers such as polyethylene, polypropylene and polyvinyl chloride, and a certain content (5-70wt%) of wood, bamboo, straw and other lignified plant fiber materials. After mixing, it is obtained by extrusion, molding, injection molding, etc. Wood-plastic composite materials have developed rapidly at home and abroad in recent decades, and are widely used in interior decoration, outdoor garden landscape, construction, transportation, packaging and other fields. Since the price of biomass fiber material is only one-tenth or even lower than that of thermoplastic polymer, increasing the content of cheap biomass fiber in the wood-plastic composite material system can not only improve the surface woodiness of wood-plastic composite material, but also significantly reduce the wood-plastic composite surface. Plastic composite materials manufacturing costs to improve their market competitiveness.

Increasing the content of wood fiber to 80-95wt% or even higher can not only reduce the amount of polymer (petrochemical resources), but also further improve the utilization rate of agricultural and forestry biomass resources. This leads to a sharp increase in the viscosity of the wood-plastic melt, which is prone to extrusion distortion and melt fracture. It is difficult to form and process. The ultra-high biomass fiber content will bring a series of problems: uneven mixing of raw materials, and change in melt fluidity. In addition, a large number of biomass fibers with low bulk density form bridges, resulting in difficult feeding and uneven dispersion in the wood-plastic matrix. The above problems will directly affect the production efficiency and quality of products, and these problems are closely related to the processing characteristics of ultra-high-filled wood-plastic composites, that is, the rheological characteristics of the melt. The rheological properties of the melt can reveal the flow laws and clarify the causes of these problems. Therefore, mastering the rheological properties of ultra-high-filled wood-plastic composites has important theoretical guidance and application value for its processing and molding and improving product quality. Through the study of WPC rheology, viscoelastic information directly related to the system can be obtained, and this information will directly reflect the influence mechanism of formulation composition, processing parameters and equipment on the WPC system. Therefore, the rheological study of WPC is very important for the actual processing and equipment improvement.

The currently commonly used rheological test methods are not suitable for the rheological performance testing of ultra-high-filled wood-plastic composites: rotational rheological testing is only suitable for systems with a biomass fiber content of less than 60wt%; capillary rheological testing methods require biomass fibers The content should not exceed 30wt%, high content or large size biomass fibers may damage the instrument or the test data may be inaccurate; in torque rheology tests, the biomass fiber content is usually required not to exceed 80wt%, otherwise there will be wall slippage and other phenomena. Limit its test accuracy. When the biomass fiber content exceeds 70wt%, the melt rheological properties of wood-plastic composites change from liquid-like to solid-like, the fluidity becomes poor, and the structure becomes more complex. It is difficult for conventional rheological testing instruments to obtain accurate viscosity, mold rheological information data such as volume, damping, etc. Effective data cannot be collected during the rheological test, which limits the development and preparation of ultra-high-filled wood-plastic composites. Therefore, developing a test method that can accurately obtain the rheological property data of ultra-high-filled wood-plastic composites is the key to the development and preparation of ultra-high-filled wood-plastic composites.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to propose a rheological test method for wood-plastic composite materials with ultra-high biomass fiber content in view of the deficiencies of the prior art, and the rheological property data of the ultra-high-fill wood-plastic composite materials obtained by the method is tested. It can play an important role in the research and development and preparation of ultra-high filling wood-plastic composite materials.

The technical scheme adopted by the present invention is as follows:

A first aspect of the present invention provides:

A rheological test method for wood-plastic composite materials with ultra-high biomass fiber content, comprising the following steps:

S1. Press the biomass fiber and the thermoplastic polymer matrix into tablets respectively;

S2, layering and stacking the pressed biomass fiber A and the thermoplastic polymer matrix B according to the combination of mass ratios to obtain a wood-plastic composite material with ultra-high wood fiber content;

S3. Put the wood-plastic composite material with ultra-high wood fiber content obtained after superimposed and combined tableting into a rheometer to test the rheological properties.

In some embodiments of the present invention, in steps S2 and S3, the mass fraction of the biomass fiber content in the ultra-high biomass fiber content wood-plastic composite material is 80-95 wt%.

In some embodiments of the present invention, in step S1, the tableting process of the biomass fiber and the thermoplastic polymer matrix is as follows: the temperature is 120-200°C, the pressure is 1-15MPa, and the time is 3-20min; the The density of the biomass fiber after tableting is 0.1-0.9 g/cm ³ , and the density of the thermoplastic polymer matrix is 0.9-1.2 g/cm ³ ; the tableting equipment is a flat vulcanizer.

In some embodiments of the present invention, in step S2, the stacked combination of the tableted biomass fiber A and the thermoplastic polymer matrix B is A/B, B/A, A/B/A, B/ At least one of A/B; the mass ratio of the pressed biomass fiber A to the thermoplastic polymer matrix B is 8:2 to 19:1.

In some embodiments of the present invention, in steps S1 and S2, the biomass fiber type is selected from at least one of wood, bamboo, and straw; the biomass fiber size is 20-100 mesh.

In some embodiments of the present invention, in steps S1 and S2, the thermoplastic polymer matrix is composed of thermoplastics and an appropriate amount of additives; the thermoplastics are new thermoplastic polymer materials or thermoplastic polymer recycled materials, selected from At least one of polyethylene, polypropylene, polyvinyl chloride and polystyrene; and/or

The adjuvants include interfacial compatibilizers and lubricants, wherein:

The interface compatibilizer is selected from maleic anhydride grafted polyethylene, maleic anhydride grafted polypropylene, maleic anhydride grafted polystyrene, glycidyl methacrylate grafted polyethylene, At least one of glycidyl methacrylate grafted polypropylene, glycidyl methacrylate grafted polystyrene, titanate, isocyanate, aminosilane, vinylsilane, and methacryloxysilane species; and/or

The lubricant is selected from at least one of paraffin wax, polyethylene wax, stearic acid, stearic acid metal salt, and ethylene acrylic acid copolymer metal salt.

In some embodiments of the present invention, in step S3, the rheometer is a rotational rheometer, and the clamp used is a non-slip flat clamp with a diameter of 25 mm.

In some embodiments of the present invention, in step S3, the axial force of the rotational rheometer is set at 1-10 N, and the temperature is set at 160-200°C.

In some embodiments of the present invention, the test mode of the rotational rheometer is at least one of temperature sweep, time sweep, and frequency sweep.

A second aspect of the present invention provides:

The application of the above-mentioned rheological test method for wood-plastic composite materials with ultra-high biomass fiber content in simulating the rheological behavior of extrusion or hot-pressing processing of wood-plastic composite materials with ultra-high biomass fiber content.

Compared with the prior art, the present invention has the following beneficial effects:

In the present invention, after the biomass fiber A and the thermoplastic polymer matrix B are respectively hot-pressed into a sheet by a flat vulcanizing machine, the biomass fiber tablet A and the thermoplastic polymer matrix tablet B are superimposed in different combinations and adopt rotational rheology. The rheological performance test is carried out by the instrument, that is, the formation of biomass fibers and thermoplastic polymer matrix is realized in the first stage of tableting process, and the formed biomass fiber and thermoplastic polymer matrix avoid the problem of fragility and dispersion of raw materials; the second step The combined stacking process can simulate the rheological behavior of ultra-high biomass fiber content wood-plastic composites extrusion or hot pressing. In addition, using a rotational rheometer to test the rheological properties of the compressed tablets stacked and combined in different ways, using a non-slip flat jig with a diameter of 25 mm, and using at least one test mode among temperature scanning, time scanning, and frequency scanning for testing, it can be Obtaining accurate rheological property data of ultra-high-filling wood-plastic composite materials largely solves the problem that traditional rheological testing methods cannot obtain rheological-property data of ultra-high-filling wood-plastic composite materials; by analyzing the testing method in the present invention The obtained rheological property data will help to further study the development and preparation of high-filling wood-plastic composite materials, and solve the problems of feeding difficulties, uneven dispersion of wood-plastic matrix, and difficulty in molding in the preparation process of high-filling wood-plastic composite materials. , and finally provide important theoretical guidance and application value for the processing and molding of high-fill wood-plastic composite materials and improving product quality.

Description of drawings

Fig. 1 is the rheological property test result of ultra-high biomass fiber content wood-plastic composite material in Example 1 of the present invention;

Fig. 2 is the rheological property test result of ultra-high biomass fiber content wood-plastic composite material in Example 2 of the present invention;

Fig. 3 is the rheological property test result of ultra-high biomass fiber content wood-plastic composite material in Example 3 of the present invention;

Fig. 4 is the rheological property test result of ultra-high biomass fiber content wood-plastic composite material in Example 4 of the present invention;

Fig. 5 is the rheological property test result of ultra-high biomass fiber content wood-plastic composite material in Comparative Example 1 of the present invention;

6 is a schematic diagram of the rheological behavior of wood-plastic composite materials with ultra-high biomass fiber content simulated by a rotational rheometer in the embodiment of the present invention; reference numerals:

1- Linear low density polyethylene (LLDPE) tablet;

2- Poplar fiber tablet.

Detailed ways

The concept of the present invention and the technical effects produced will be clearly and completely described below with reference to the embodiments, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts are all within the scope of The scope of protection of the present invention.

Exemplarily, in the following examples, the instrument used is a rotational rheometer, the fixture is a non-slip plate fixture with a diameter of 25mm, the test method is stress control method, the torque is controlled between 1 and 10N, and the temperature is controlled. Between 160 and 200° C., scan and test the stacked and combined samples.

Example 1

A rheological test method for wood-plastic composite materials with ultra-high biomass fiber content, comprising the following steps:

S1. Use a flat vulcanizer to press the poplar fiber for 7 minutes at a temperature of 170 °C and a pressure of 9 MPa; at the same time, use a flat vulcanizer to press the linear low density polyethylene (LLDPE) into a tablet at a temperature of 140 °C and a pressure of 5 MPa. 5min.

S2, the poplar fiber and LLDPE after tableting are respectively 8:2 according to the mass ratio; the combination method is LLDPE/poplar fiber and layered and superimposed to obtain a wood-plastic composite material with ultra-high wood fiber content;

S3. After the temperature of the rotational rheometer is raised to 180°C, the wood-plastic composite material with ultra-high wood fiber content obtained after superimposed and combined tableting is put into a flat clamp with a diameter of 25mm in the rheometer, and the axial force is 5N. Temperature and time sweeps were performed to simulate the processing rheological behavior of wood-plastic composites with ultra-high biomass fiber content.

The rheological performance test results of the wood-plastic composites with ultra-high biomass fiber content obtained after superimposed and combined tableting are shown in Figure 1. The figure shows the frequency ω dependence of storage modulus and complex viscosity of poplar fiber and LLDPE when the mass ratio is 8:2, which is used to simulate the storage modulus and complex viscosity of the wood-plastic system with 80wt% biomass fiber content. Compared with the high frequency region, the difference of rheological parameters in the low frequency region is more obvious, because the low frequency region characterizes the motion of polymer molecular chains and long chain segments, while the high frequency region is the motion of short chain segments. . The frequency dependence of the storage modulus of the 80 wt % wood-plastic system is weakened, and it exhibits an obvious solid-like rheological behavior in the low frequency region. This limitation stems from the formation of a network structure of ultra-high biomass biomass in the system. The complex viscosity of 80 wt % WPC decreases significantly with the increase of frequency, showing a significant shear-thinning non-Newtonian behavior. The rheological data results in Figure 1 can effectively clarify the rheological law of the 80wt% wood-plastic system.

Example 2

A rheological test method for wood-plastic composite materials with ultra-high biomass fiber content, comprising the following steps:

S1. Use a flat vulcanizer to press the poplar fiber for 7 minutes at a temperature of 170 °C and a pressure of 9 MPa; at the same time, use a flat vulcanizer to press the linear low density polyethylene (LLDPE) into a tablet at a temperature of 140 °C and a pressure of 5 MPa. 5min.

S2, the poplar fiber and LLDPE after tableting are respectively 17:3 in mass ratio; the combination method is LLDPE/poplar fiber, layered and superimposed to obtain a wood-plastic composite material with ultra-high wood fiber content;

S3. After the temperature of the rotational rheometer is raised to 180°C, the wood-plastic composite material with ultra-high wood fiber content obtained after the superimposed and combined tableting is placed in a rheometer with a diameter of 25mm, and the axial force is 5N. , performing temperature and time sweeps to simulate the processing rheological behavior of wood-plastic composites with ultra-high biomass fiber content.

The rheological properties test results of the wood-plastic composites with ultra-high wood fiber content obtained after superimposed and combined tableting are shown in Figure 2. The figure shows the frequency ω dependence of storage modulus and complex viscosity of poplar fiber and LLDPE when the mass ratio is 17:3 to simulate the storage modulus and complex viscosity of the wood-plastic system with 85wt% biomass fiber content. Compared with the high frequency region, the difference of rheological parameters in the low frequency region is more obvious, because the low frequency region characterizes the motion of polymer molecular chains and long chain segments, while the high frequency region is the motion of short chain segments. . The frequency dependence of the storage modulus of the 85 wt % wood-plastic system is weakened, and it exhibits an obvious solid-like rheological behavior in the low frequency region. This limitation stems from the formation of a network structure of ultra-high biomass biomass in the system. The complex viscosity of 85 wt % wood-plastic decreases significantly with increasing frequency, showing a significant shear-thinning non-Newtonian behavior. The rheological data results in Figure 2 can effectively clarify the rheological law of the 85wt% wood-plastic system.

Example 3

A rheological test method for wood-plastic composite materials with ultra-high biomass fiber content, comprising the following steps:

S1. Use a flat vulcanizer to press the poplar fiber for 7 minutes at a temperature of 170 °C and a pressure of 9 MPa; at the same time, use a flat vulcanizer to press the linear low density polyethylene (LLDPE) into a tablet at a temperature of 140 °C and a pressure of 5 MPa. 5min.

S2, the poplar fiber and LLDPE after tableting are respectively 9:1 according to the mass ratio; the combination method is LLDPE/poplar fiber and layered and superimposed to obtain a wood-plastic composite material with ultra-high wood fiber content;

S3. After the temperature of the rotational rheometer is raised to 180°C, the wood-plastic composite material with ultra-high wood fiber content obtained after the superimposed and combined tableting is placed in a rheometer with a diameter of 25mm, and the axial force is 5N. , performing temperature and time sweeps to simulate the processing rheological behavior of wood-plastic composites with ultra-high biomass fiber content.

The rheological properties test results of the wood-plastic composites with ultra-high wood fiber content obtained after superimposed and combined tableting are shown in Figure 3. The figure shows the frequency ω dependence of storage modulus and complex viscosity of poplar fiber and LLDPE when the mass ratio is 9:1 to simulate the storage modulus and complex viscosity of the wood-plastic system with 90wt% biomass fiber content. Compared with the high frequency region, the difference of rheological parameters in the low frequency region is more obvious, because the low frequency region characterizes the motion of polymer molecular chains and long chain segments, while the high frequency region is the motion of short chain segments. . The dependence of the storage modulus on the frequency of the 90 wt % wood-plastic system is weakened, and it exhibits an obvious solid-like rheological behavior in the low frequency region. This limitation stems from the formation of a network structure of ultra-high biomass biomass in the system. The complex viscosity of 90 wt % WPC decreases significantly with increasing frequency, showing a significant shear-thinning non-Newtonian behavior. The rheological data results in Figure 3 can effectively clarify the rheological law of the 90wt% wood-plastic system.

Example 4

A rheological test method for wood-plastic composite materials with ultra-high biomass fiber content, comprising the following steps:

S1. Use a flat vulcanizer to press the poplar fiber for 7 minutes at a temperature of 170 °C and a pressure of 9 MPa; at the same time, use a flat vulcanizer to press the linear low density polyethylene (LLDPE) into a tablet at a temperature of 140 °C and a pressure of 5 MPa. 5min.

S2, the poplar fiber and LLDPE after tableting are respectively 19:1 according to the mass ratio; the combination method is LLDPE/poplar fiber and layered and superimposed to obtain a wood-plastic composite material with ultra-high wood fiber content;

S3. After the temperature of the rotational rheometer is raised to 180°C, the wood-plastic composite material with ultra-high wood fiber content obtained after the superimposed and combined tableting is placed in a rheometer with a diameter of 25mm, and the axial force is 5N. , performing temperature and time sweeps to simulate the processing rheological behavior of wood-plastic composites with ultra-high biomass fiber content.

The rheological performance test results of the wood-plastic composites with ultra-high biomass fiber content obtained after superimposed and combined tableting are shown in Figure 4. The figure shows the frequency ω dependence of storage modulus and complex viscosity of poplar fiber and LLDPE when the mass ratio is 19:1 to simulate the storage modulus and complex viscosity of the wood-plastic system with 95wt% biomass fiber content. Compared with the high frequency region, the difference of rheological parameters in the low frequency region is more obvious, because the low frequency region characterizes the motion of polymer molecular chains and long chain segments, while the high frequency region is the motion of short chain segments. . The frequency dependence of the storage modulus of the 95 wt % wood-plastic system is weakened, and it exhibits an obvious solid-like rheological behavior in the low frequency region. This limitation stems from the formation of a network structure of ultra-high biomass biomass in the system. The complex viscosity of 95 wt % WPC decreases significantly with increasing frequency, showing a significant shear-thinning non-Newtonian behavior. The rheological data results in Figure 4 can effectively clarify the rheological law of the 95wt% wood-plastic system.

Comparative Example 1

A rheological test method for wood-plastic composite materials with ultra-high biomass fiber content, comprising the following steps:

S1, mix the poplar fiber whose mass fraction is 80wt% and the LLDPE whose mass fraction is 20wt% by a mixer;

S2. After the above components are fully mixed and uniform, a twin-screw extruder is used to melt and granulate to obtain ultra-high filled wood-plastic pellets with a mass fraction of 80wt% poplar fiber content;

S3. The above-mentioned ultra-high-filling wood-plastic pellets are extruded or hot-pressed to obtain a wood-plastic composite material with a mass fraction of 80 wt% poplar fiber content.

The obtained wood-plastic composite material with a mass fraction of 80wt% poplar fiber content was subjected to a temperature and time scanning test in a rotational rheometer. The data appeared discrete, and more accurate rheological property data could not be obtained. The rheological properties The test results are shown in Figure 5. The figure shows the frequency ω dependence of the storage modulus and the complex viscosity of the wood-plastic system with 80wt% biomass fiber content after hot pressing when the mass ratio of poplar fiber and LLDPE is 8:2, respectively. The data of storage modulus and complex viscosity have obvious dispersion phenomenon in the low frequency region, indicating that the wood-plastic system with 80wt% biomass fiber content is directly tested by rotational rheometer, due to the wall slip phenomenon between the sample and the fixture surface , it is impossible to obtain accurate and effective rheological data. Therefore, the traditional rheological test method is no longer suitable for 80wt% biomass fiber content wood-plastic system.

Comparative Example 2

A rheological test method for wood-plastic composite materials with ultra-high biomass fiber content, comprising the following steps:

S1, mix the poplar fiber whose mass fraction is 85wt% and the LLDPE whose mass fraction is 15wt% by a mixer;

S2, after fully mixing the above-mentioned components, adopt twin-screw extruder to melt and granulate to obtain ultra-high filled wood-plastic pellets with a mass fraction of 85wt% poplar fiber content;

S3, the above-mentioned wood-plastic pellets are formed by hot pressing to obtain a wood-plastic composite material with a mass fraction of 85wt% poplar fiber content, and the mass fraction of 85wt% poplar fiber content wood-plastic composite material is unsuccessfully obtained by extrusion molding composite material.

The obtained wood-plastic composite material with a mass fraction of 85wt% poplar fiber content was scanned in a rotational rheometer for temperature and time, and the sample appeared wall-slip phenomenon, and accurate rheological property data could not be obtained.

Comparative Example 3

A rheological test method for wood-plastic composite materials with ultra-high biomass fiber content, comprising the following steps:

S1, mix the poplar fiber whose mass fraction is 90wt% and the LLDPE whose mass fraction is 10wt% by a mixer;

S2. After the above components are fully mixed and uniform, a twin-screw extruder is used to melt and granulate. Due to the difficulty of feeding and the agglomeration of poplar fibers, it is impossible to obtain ultra-high filled wood-plastic pellets with a mass fraction of 90wt% poplar fiber content. material.

Performance Testing

In order to better illustrate the present invention, the performance test of the wood-plastic composite materials with ultra-high wood fiber content obtained in Examples 1-4 and the wood-plastic composite materials obtained in Comparative Example 1 is carried out below. The performance test results are shown in Figures 1-5. Show.

It can be seen from the experimental data in Figures 1 to 5 that the ultra-high wood fiber content wood-plastic composite materials in Examples 1 to 4 of the present invention can realize the rheological performance test of the ultra-high wood fiber content wood-plastic composite materials, and the test obtains accurate Rheological data.

The above-mentioned embodiments of the present invention are only examples for illustrating the present invention, and are not intended to limit the specific embodiments of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above examples. Not all embodiments can be exemplified in detail here. Any obvious changes or changes derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims (10)

1. a method for rheological testing of wood-plastic composite materials with ultra-high biomass fiber content, is characterized in that, comprises the following steps: S1. Press the biomass fiber and the thermoplastic polymer matrix into tablets respectively; S2, layering and stacking the pressed biomass fiber A and the thermoplastic polymer matrix B according to the combination of mass ratios to obtain a wood-plastic composite material with ultra-high wood fiber content; S3. Put the wood-plastic composite material with ultra-high wood fiber content obtained after superimposed and combined tableting into a rheometer to test the rheological properties. 2 . The test method according to claim 1 , wherein in steps S2 and S3 , the mass fraction of biomass fiber content in the wood-plastic composite material with ultra-high biomass fiber content is 80-95 wt %. 3 . 3. The test method according to claim 1, characterized in that: in step S1, the tableting process of the biomass fiber and the thermoplastic polymer matrix is as follows: the temperature is 120～200°C, the pressure is 1～15MPa, and the time The density of the biomass fiber after tableting is 0.1-0.9 g/cm ³ , and the density of the thermoplastic polymer matrix is 0.9-1.2 g/cm ³ ; the tableting equipment is a flat vulcanizer . 4. The test method according to any one of claims 1 to 3, characterized in that: in step S2, the superimposed combination of the biomass fiber A and the thermoplastic polymer matrix B after the tableting is A/B, At least one of B/A, A/B/A, and B/A/B; the mass ratio of the pressed biomass fiber A to the thermoplastic polymer matrix B is 8:2 to 19:1. 5. The test method according to claim 1, characterized in that: in steps S1 and S2, the biomass fiber type is selected from at least one of wood, bamboo, and straw; the biomass fiber size is 20-20 100 mesh. 6. The test method according to any one of claims 1 to 3, characterized in that: in steps S1 and S2, the thermoplastic polymer matrix is composed of a thermoplastic and an appropriate amount of auxiliary; the thermoplastic is a thermoplastic polymer virgin material or thermoplastic polymer recycled material, at least one selected from polyethylene, polypropylene, polyvinyl chloride and polystyrene; and/or The adjuvants include interfacial compatibilizers and lubricants, wherein: The interface compatibilizer is selected from maleic anhydride grafted polyethylene, maleic anhydride grafted polypropylene, maleic anhydride grafted polystyrene, glycidyl methacrylate grafted polyethylene, At least one of glycidyl methacrylate grafted polypropylene, glycidyl methacrylate grafted polystyrene, titanate, isocyanate, aminosilane, vinylsilane, and methacryloxysilane species; and/or The lubricant is selected from at least one of paraffin wax, polyethylene wax, stearic acid, stearic acid metal salt, and ethylene acrylic acid copolymer metal salt. 7. The test method according to claim 1, characterized in that: in step S3, the rheometer is a rotational rheometer, and the clamp used is a non-slip diameter 25mm flat clamp. 8 . The testing method according to claim 7 , wherein in step S3 , the axial force of the rotational rheometer is set to 1-10 N, and the temperature is set to 160-200° C. 9 . 9 . The test method according to claim 8 , wherein the test mode of the rotational rheometer is at least one of temperature scanning, time scanning, and frequency scanning. 10 . 10. The application of the test method according to any one of claims 1 to 9 in simulating the rheological behavior of extrusion or hot-pressing processing of wood-plastic composite materials with ultra-high biomass fiber content.

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