Abstract
The physical properties and the fatigue resistance of a copolymer fiber of Poly (p-phenyleneterephthalamide) (PPT) of which diaminocomonomer is NN′-Bisaminobenzoilethylenediamine were studied by the tensile measurement and the Good year tube fatigue test.The following results were obtained.1) With the decrease in the denier of wholly p-aromatic polyamide having extended chain structure, the toughness and fatigue resistance increase.2) The durability of wholly p-aromatic polyamide used as a reinforcement material in rubber is determined by the resistance against compression.3) The fatigue resistance of the copolymer fiber is superior to that of PPT fiber.
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