Thermomechanical properties of thoroughly reinforced and epoxy organic fibre-plastic composite
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As a result of comparative studies, it has been found that the heat resistance of thoroughly reinforced organo-fibre-plastics based on PHA fibres significantly exceeds the heat resistance of plastics based on epoxy binders, especially in the temperature range 370–550 K, that is, above the glass point of the binders. The degree of retention of destructive stress in extension of the TRFP at elevated temperatures is also noticeably larger as compared with that of the starting fibres.
For TRFP, a considerable anisotropy in their thermomechanical properties in two mutually perpendicular directions is characteristic: the temperature for efficient serviceability of material along the direction of reinforcement is about 70 K higher than in the direction perpendicular to it.
KeywordsPolymer Anisotropy Epoxy Elevated Temperature Heat Resistance
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