Glass Fiber

Broad-range amplification of bacterial DNA from clinical specimens has proved useful for the diagnosis of various bacterial infections, especially during antimicrobial treatment of the patient. Optimal sample processing protocols for diagnostic broad-range bacterial PCR should release DNA from an array of target organisms with equal efficiencies and wash out inhibitory factors from various sample types without introducing bacterial DNA contamination to the amplification reaction. In the present study, two physical cell wall disintegration methods, bead beating and sonication, for enhanced detection of organisms with difficult-to-lyse cell walls were studied. The analytical sensitivities of several commercially available DNA purification kits, which were used with and without additional cell disintegration steps, were compared by using dilution series of model bacteria. Selected purification methods were used to process routine clinical specimens in parallel with the standard phenol-...

The in-vivo response to a composite material obtained with polyetherimide (PEI) reinforced with carbon/glass fibers was investigated by histological methods by implanting cylinders in muscle and in bone of the New Zealand White rabbit. A common metallic alloy, widely used in orthopaedic surgery, was used as control (Stellite). The aim of the study was to analyze the biological response towards the surface of the material. Composite implants and metallic implants did not induce adverse or inflammatory reactions. The morphological picture produced was similar, in muscle and in bone, for both materials. In muscle, cylinders were confined by an extremely thin fibrous layer and the overall appearance of the muscular tissue was normal. In bone, cylinders were confined by a nearly annular rim of newly formed bone. From these data it is possible to derive that the response to PEI-based composite material is comparable with the response to metallic substrate and, then, the material can be su...

In this research the variation of mechanical and rheological properties of the composite as a function of different processing parameters and ethylene propylene diene monomer (EPDM) rubber content was studied. The optimum amount of dicumyl peroxide (DCP) to achieve the highest percentage of grafting of maleic anhydride to EPDM was obtained by Fourier transform infrared (FTIR) spectroscopy. In general, immiscibility between nylon 66 and EPDM, and their high interfacial tension makes their blending difficult. Maleic anhydride was grafted to EPDM to reduce interfacial tension between two phases. Also the blends were prepared at highest possible speed of mixing (screw speed in extrusion) and lowest temperature to reach a well mixed sample which can be seen in scanning electron microscopy (SEM) images and impact strength results. Dynamic mechanical thermal analysis (DMTA) tests were conducted to evaluate the miscibility of the components and to measure the glass transition temperature of...

A hybrid composite material is being prepared using recycled rubber as filler, epoxy resin as matrix
with woven glass fibre as reinforcement.Two types of composites are preparedby adding without any
filler and with recycled rubber filler.Hand layup technique is used for preparing the composites. 400
gsm glass woven fabrics are used in both cases. The flexural test was carried out by three point
bending method. Additionally, the modulus of elasticity E was found out in tensile test in case of both
Plain and new hybrid composite.The 6 % rubber filled composites shown the higher flexural strength
and the elasticity is increased with increase in the filler addition.

Two organofunctional silanes and a copolymer were used to increase the interfacial adhesion in glass fiber polypropylene (PP) reinforced composites. The performance of the coupling agents was investigated by means of mechanical property measurements, scanning electron microscopy (SEM), and dynamic mechanical analysis. The increased adhesion between the glass fibers and PP matrix observed with SEM resulted in an improvement of the mechanical and dynamic mechanical properties of the composites. Coupling achieved with the copolymer poly(propylene-g-maleic anhydride) (PP-g-MA) proved to be the most successful compared with 3-aminopropyltrimethoxysilane and 3-aminopropyltriethoxysilane. The combination of PP-g-MA with the silanes resulted in further property improvements because of the ability of the MA groups to react with the amino groups of the silanes. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 701–709, 2001

The present work is to determine the mechanical properties of a polymer composite which
consist of a vinyl ester as matrix and woven glass fiber (E-glass) filled with milled recycled
rubber as reinforcement. The influences of different volume (0%, 3%, 6%, and 9%) of the filler
on the mechanical properties of the composites were studied. The composite materials are
analyzed with the consideration of recycled rubber and without recycled rubber. The mechanical
characteristics of these composite materials are compared in terms of young’s modulus using
tensile test and flexural strength using flexural test as per the ASTM standards.The hybrid
composite filled with 6% reinforcement shows better properties in terms of flexural strength and
elasticity is increased with increase in filler addition.

Centrifugal pumps are widely used for water supply plants, steam power plants, sewage, oil refineries, chemical plants, hydraulic power service, food processing factories and mines, because of their suitability in practically any service. Therefore it is necessary to find out the design parameter, working conditions and maximum efficiency with lowest power consumption. Study indicates that Computational fluid dynamics (CFD) analysis is being increasingly applied in the design of centrifugal pumps. Various parameters affect the pump performance and energy consumption. The impeller material, blade angle and the blade number are the most critical. Therefore it is necessary for development in the impeller so we can improve the performance of pump.

A great amount of work has been done over the past few years to understand the structure–properties relationship in polypropylene/glass fiber composites. This is because of the very fast-growing rate of polypropylene applications in the automotive and other industries. This work focused on the role of glass fibers and fiber–matrix adhesion on deformation mechanism. Composites with different fiber content, with and without adhesion promoter, were fabricated. Tensile tests and microscopy techniques were conducted. Based on the results, a physical model has been proposed that illustrates the initiation and growth of the damage under static loading condition. According to this work, the introduction of glass fibers shifts the deformation mechanism from shear yielding to crazing. Although crazes propagate in a different manner in composites containing standard and treated fibers, no influence of interfacial adhesion was observed on craze thickening phenomenon. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 87: 2171–2176, 2003

Composites are made by combining of two or more different materials, which are having different characteristics. Composites materials are widely used today in various applications. Pultrusion process is used to manufacture composite material, in these process different types of roving of glass, carbon, aramid fibres are used to make different pultruded material as per their application. Pultruded product which are various types of shape like C-channel, I-beam, square pipe, circular pipe etc…, Today pultruded products are used in various applications like bridges, FRP ladders, communication tower, cooling tower, etc…There are several products of pultrusion products used in different application, but we have to analyze different products uses for a special application in terms of strength.

Ryszard Romaniuk, Warsaw University of Technology, Tailored optical fibers technology, This report contains a comprehensive description of the basic and engineering, including some practical and application, aspects of tailored optical fibers (analysis, design, fabrication and measurements) such as signal transmission properties, optical signal transformation, fiber materials and fabrication processes, as well as real fiber characteristics and environmental sensitivities. Tailored optical fibers are defined here generally as the ones not designed directly for long-haul applications. Detailed data on the optical, thermal, chemical and mechanical properties of various fiber materials and optical filaments researched and measured by the author and his co-workers at Biaglass Co. are described. The fabrication processes of optical fibers are also described from the viewpoint of understanding what factors are important in the manufacture of special fibers. The modified multicrucible process (MMC), which has been co-developed by the author, is described in detail, as well as mosaic assembling technology, and hybrid ones – leading to very complex filamentary optical guiding structures. Brief review of fundamental kinds of studied tailored fibers, associated design problems and signal properties leads to a list of potential applications as photonic functional devices. Design algorithms to fulfill some of the application requirements and their theoretical background as well as hardware realization are described. The report contains also some practical information for tailored optical fibers users and photonic components, circuits and systems designers.

In this experimental study, glass fiber reinforced epoxy composite samples were prepared for tensile and impact strength analysis. Woven roving mats (E-glass fiber orientation 0/90 degree , 300g/m2) were cut in measured dimensions and a mixture of Epoxy Resin (CY-205, Density-1.27gm/cm3), Hardener (HY 951, Density- 0.94 gm/cm3) and Acetone [(CH3)2CO, M= 38.08g/mol] was used to manufacture the glass fiber reinforced epoxy composite by hand lay-up method. The ratio of epoxy: hardener: acetone was varied and the tensile and impact strength of the specimen were compared.

This article studies the mechanical properties of short fiber reinforced polymer blends comprised of a soft thermoplastic matrix (polyethylene, PE), a rigid dispersed thermoplastic phase (polyamide-6, PA6) and glass fiber reinforcement. These ternary composites are designed as a model system to investigate the impact of the mutual interactions of the three phases on the composite mechanical properties. For this purpose