高强高模PVA纤维的横纹结构  

Cross-Striation Structure of High Strength and High Modulus PVA Fiber

作　　者：王斌[1] 祁玉冬[1] 姜猛进[1] 叶光斗[1] 徐建军[1] 

机构地区：[1]四川大学高分子材料工程国家重点实验室高分子科学与工程学院,四川成都610065

出　　处：《高分子材料科学与工程》2010年第3期89-92,共4页Polymer Materials Science & Engineering

基　　金：总装备部武器装备预研基金项目(51412020404SC0101)

摘　　要：选取不同转化率下无乳化剂乳液聚合制得的聚乙烯醇(PVA)进行凝胶纺丝,经相同后处理工艺处理后,得到两种纤维,光学显微镜下观察到低转化率下制得的纤维有横纹,高转化率下的无横纹。采用纤维强伸仪、偏光显微镜、扫描电镜(SEM)、X射线衍射及差示扫描量热(DSC)对纤维力学性能、表面形貌和内部结构进行分析,结果表明,两种纤维都具有较高的力学性能,内部较致密,横纹纤维较无横纹纤维结晶度高,表面较光滑。理论推测横纹由拉伸过程中形成的柱晶结构引起。The poly（vinyl alcohol）（PVA）,obtained by emulsifier-free emulsion polymerization of PVAc with different conversions,was spun via a gel-spinning method.Two kinds of fibers were obtained after the same post-treatment condition,one with cross-striation on the surface and the other not,observed by optical microscope.The,surfaces and structures of them were analyzed using fiber tensile tester,polarized microscope,scanning electron microscope（SEM）,X-ray diffraction（XRD）and differential scanning calorimetry（DSC）.Results show that both fibers have good mechanical performance and compact inner structure.The cross-striation fiber has higher crystalline degree and smoother surface than non-cross-striation fiber.It is speculated that column crystal is formed during the tensile process and cause the cross-striation.

关 键 词：聚乙烯醇 高强高模纤维 横纹 

分 类 号：TQ342.4[化学工程—化纤工业]