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IntroductionHighperformancepara aramidfiberisakindofhighstrengthhighmodulusfiber,whichismadefromthelyotropicsolutionofPPTA(poly(p phenyleneterephthalamide) )inhighconcentratedH2 SO4 (99%)solventbydry jetwet spinning[1] .Para aramidfiberswerefirstcommeralizedbyAm… 相似文献
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