The effects of glass powder on some mechanical properties of engineering thermoplastics (original) (raw)
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Materials Today: Proceedings, 2020
A composite material, which are stronger, lighter, or less expensive when compared to traditional materials are preferred for many applications. This work deals with development and testing of glass fiber composite with epoxy and different filler material, which would be suitable and economical for applications demanding low weight to strength ratio and high thermal resistance such as handle cover of pressure cooker. Nine samples of glass fiber reinforced epoxy composites was manufactured by hand lay method, with varying concentration of fillers namely aluminum oxide (Al 2 O 3), magnesium hydroxide (Mg(OH) 2), silicon carbide (SiC), and hematite powder(Fe 2 O 3). The experimental testing of all these samples was carried out to determine thermal conductivity, thermal expansion coefficient, density and ultimate tensile strength. It was seen that Al 2 O 3 and Mg(OH) 2 filled composites shows low thermal conductivities. Also, composites filled by SiC particles revealed low thermal expansion coefficient as compared with others. Based on these results, suitable composition was selected to fabricate pressure cooker handle cover. The simulation result of handle cover with selected composite showed significant improvement as compared to standard material. Lower weight and high thermal strength of this composite can be utilized in various fields of applications.
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Plastics used in the form of carry bags, pouches, sheets and various other shapes discarded into the Municipal Solid Waste (MSW) is a major concern of environmental pollution these days. In India synthetic textiles from the garment industry and from the rubber industry also goes to the MSW stream. The objective of this paper is to combine the stiffness and strength of the short synthetic fi bers with the waste polyethylene matrix to form useful products. In this study glass fi bers have been chosen from the tyre industry and chopped to short fi bers before mixing with waste plastics. The composites of Short glass fi ber (GF) reinforced Waste Polyethylene (WPE) and neat High Density Polyethylene (HDPE) were prepared separately by melt-mixing technique in a Brabender plasticorder under optimum process conditions. Physico-mechanical properties of the composites at different fi ber loadings were determined using standard methods. Thermal stability of the composites was determined using a thermo gravimetric analyzer. It was observed that the strength properties improved with the fi ber loading up to 50 wt% of the short glass fi bers; beyond which it reduced due to dilution effect. The effect of Maleic anhydride (MAH) grafting onto the waste polyethylene improved the fi ber-matrix adhesion signifi cantly. The effect of Ethylene methacrylic acid (EMA) copolymer as a matrix modifi er improves the adhesion with the glass fi bers. The Waste Polyethylene composites were compared with those of neat HDPE glass fi ber reinforced composites, for its strength and thermal stability. Thermal stability of the composites improved as expected. The results were supplemented by fracture studies by SEM.
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This paper deals with fabrication and characterization of unique polyphenylene ether/polystyrene/nylon-6/glass composites. Compounding of ternary blends with glass fibres was performed using twin screw co-rotating extruder. Test specimens were fabricated by compression moulding and injection moulding. Effect of maleic anhydride, fibre type (chopped and long), fibre content (30 wt. % and 40 wt. %) and fabrication method (compression moulding and injection moulding) on mechanical and thermal properties was studied. Maleic anhydride negatively influenced mechanical and thermal properties. Composites with 40 wt. % chopped fibres showed superior mechanical strength and those with 30 wt. % long fibres showed superior thermal properties, tensile and flexural moduli. Injection moulded specimens exhibited superior mechanical and thermal properties. The composites were studied for moisture content, density, melt flow index, glass transition temperature, thermal degradation temperature and mec...
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Journal of Applied Polymer Science, 2008
Composites of recycled poly(ethylene terephthalate) (PET) reinforced with short glass fiber (GF) (0, 20, 30, and 40 wt %) were compounded in a single-screw extruder (SSE) and in a intermeshing corotating twinscrew extruder (TSE). An SSE fitted with a barrier double-flight screw melting section in between two singleflight sections and a TSE with a typical screw configuration for this purpose were used. The composites were subsequently injection molded at two different mold temperatures (10 and 1208C), with all other operative molding parameters kept constant. The effects of processing conditions on composite microstructure, PET degree of crystallinity, and composite mechanical properties were evaluated. Appropriate dispersive and distributive mixing of the glass fiber throughout the PET matrix as well as fine composite mechanical and thermal-mechanical properties were achieved regardless of whether the composites were prepared in the SSE or TSE. The performance of the SSE was attributed to the efficiency of the barrier screw melting section in composite mixing. The mold temperature influenced the mechanical properties of the composites, by controlling of the degree of crystallinity of the PET in the composites. For a good balance of mechanical and thermal-mechanical properties, high mold temperatures are desirable, typically, 1208C for a mold cooling time of 45 s.