PPy-UHMWPE纤维结构与性能的研究  

A study on structure and properties of PPy-UHMWPE fibers

作　　者：边丽娜[1] 肖长发[1] 金欣[1] 

机构地区：[1]天津工业大学天津市改性与功能纤维重点实验室,天津300160

出　　处：《纺织学报》2011年第3期1-4,24,共5页Journal of Textile Research

基　　金：中国石油化工集团公司项目(J208031)

摘　　要：针对目前超高分子量聚乙烯(UHMWPE)纤维与树脂界面黏结性能较差的问题,以三氯化铁为氧化剂,采用液相沉积聚合方法制备了聚吡咯-超高分子量聚乙烯(PPy-UHMWPE)复合纤维,然后将微滴直径在300～700μm的环氧树脂滴在纤维上,并对纤维/微滴试样进行拉出实验。结果表明,经吡咯沉积聚合后,PPy-UHMWPE纤维与环氧树脂的界面剪切强度有较大提高,约为未处理纤维与环氧树脂界面剪切强度的3倍。通过SEM、FT-IR、DSC、DMA研究处理前后纤维表面形貌和结构的变化,表明在PPy-UHMWPE复合纤维中,PPy与UHMWPE分子链间无化学键作用,PPy-UHMWPE纤维的熔融峰为单峰,且熔点略有下降。In view of the poor interfacial bonding performance between the ultra-high molecular weight polyethylene（UHMWPE） fiber and resin,this research attempted to make polypyrrole-ultra-high molecular weight polyethylene（PPy-UHMWPE） composite fibers by liquid-phase deposition polymerization,using ferric chloride as the oxidizing agent.After that,the epoxy resin micro-droplets with a diameter of 300-700 μm were put on the fiber,and the pulled out experiments were carried out on the fiber/micro-drop specimens.The experimental results showed that the interfacial shear strength between the PPy-UHMWPE fiber and epoxy resin was 2 times higher than that of untreated fiber and epoxy resin.The surface morphology and structure of the fibers before and after treatment were investigated respectively by SEM,FT-IR,DSC and DMA,and it was found there is no chemical bond between PPy and UHMWPE chain in the PPy-UHMWPE fibers.PPy-UHMWPE fibers exhibited monomorph characteristics and the melt point decreased a little.

关 键 词：UHMWPE纤维 表面改性 聚吡咯 剪切强度 

分 类 号：TS131.9[轻工技术与工程—纺织材料与纺织品设计]