EVA共混改性UHMWPE纤维的表面性能  

Surface properties of UHMWPE fiber blending modified with EVA

作　　者：邝金艳[1] 于俊荣[1,2] 肖明明[2] 胡祖明[1,2] 陈蕾[1,2] 诸静[2] 

机构地区：[1]东华大学高性能纤维及制品教育部重点实验室,上海201620 [2]东华大学纤维材料改性国家重点实验室,上海201620

出　　处：《合成纤维工业》2011年第5期1-4,共4页China Synthetic Fiber Industry

基　　金：国家863项目(2009AA034602);上海市重点学科项目(B603)

摘　　要：以乙烯-醋酸乙烯酯共聚物(EVA)作为共混改性剂,将其溶解在超高相对分子质量聚乙烯(UHMWPE)纺丝溶液中,制得共混改性UHMWPE冻胶纤维;对改性UHMWPE冻胶纤维进行萃取,干燥和热拉伸制得改性UHMWPE纤维;研究了改性前后纤维的结构与性能。结果表明:共混改性后UHMWPE纤维表面引入了极性基团,纤维与树脂基体的界面剪切强度得到提高,纤维表面浸润性能提高,但纤维的力学性能下降,纤维的熔点和结晶度降低,纤维重结晶温度上升,晶粒尺寸变大。Ethylene/vinyl acetate copolymer（EVA） was used as a blending modifier to dissolve in the spinning solution of ultrahigh -relative molecular mass polyethylene（UHMWPE） to prepare blending modified UHMWPE gel fiber which was exposed to the extraction,drying and heat drawing to prepare UHMWPE fiber.The structure and properties of UHMWPE fibers were studied before and after modification.The results showed that the interfacial shear strength of the fiber with resin matrix were improved as the polar groups were introduced into the surface of UHMWPE fiber after blending modification.Meanwhile,the surface soaking ability of the fiber was improved,but the mechanical properties were depressed;the melting point and the crystallinity were decreased, and the recrystallization temperature and the crystal size were increased.

关 键 词：乙烯-醋酸乙烯酯共聚物 超高相对分子质量聚乙烯纤维 共混改性 力学性能 界面剪切强度 

分 类 号：TQ342.7[化学工程—化纤工业]