聚丙烯/乙烯-乙烯醇共聚物中空纤维及其硬弹性行为  

Polypropylene/Ethylene-vinyl Alcohol Copolymer Hollow Fibers andIts Hard Elastic Behavior

作　　者：罗大军 秦舒浩[2] 伍剑明[1] 李杨 高进 LUO Dajun;QIN Shuhao;WU Jianming;LI Yang;GAO Jin(School of Materials and Metallurgical Engineering,Guizhou Institute of Technology,Guiyang 550003,China;National Engineering Research Center for Compounding and Modification of Polymeric Materials,Guiyang 550014,China)

机构地区：[1]贵州理工学院材料与冶金工程学院,贵阳550003 [2]国家复合改性聚合物材料工程技术研究中心,贵阳550014

出　　处：《材料导报》2020年第S02期534-538,共5页Materials Reports

基　　金：贵州省科技厅计划项目(黔科合LH字[2016]7099;黔科合基础[2019]1134)。

摘　　要：以聚丙烯(PP)为基体,乙烯-乙烯醇共聚物(EVOH)为亲水第二相聚合物制备PP/EVOH共混物,通过聚丙烯接枝马来酸酐(PP-g-MAH)改善两相相容性,并结合熔融纺丝技术制备具有硬弹性的亲水PP/EVOH中空纤维。结合水接触角和EDS分别考察EVOH的引入对PP基体及中空纤维亲水性的影响;采用DSC研究EVOH引入后PP/EVOH中空纤维中PP相的结晶行为,进而通过测试PP/EVOH中空纤维的力学性能及弹性回复率等性能,综合研究PP/EVOH中空纤维的硬弹性行为。结果表明,随着EVOH比例增加,PP/EVOH中空纤维表面含氧量最高为5.65%(质量分数),纤维亲水性得到有效改善。PP-g-MAH引入使PP相结晶受阻,导致PP/EVOH中空纤维硬弹性变弱。尽管加入EVOH可以起到异相成核和促进结晶的作用,使PP/EVOH中空纤维仍然具有良好的硬弹性,但仍然弱于纯PP中空纤维。Ethylene-vinyl alcohol copolymer(EVOH)as hydrophilic modification agent and polypropylene-g-maleic anhydride(PP-g-MAH)as a compatibilizer were blended with PP to prepare hydrophilic PP/EVOH hollow fibers with hard elasticity by melt spinning.The effect of EVOH on the hydrophilicity of PP matrix and hollow fibers was investigated by WCA and EDS analysis.The crystallization behavior of PP phase in PP/EVOH hollow fibers after adding EVOH was also analyzed by DSC.In addition,the mechanical properties and elastic recovery of PP/EVOH hollow fibers were tested,and the hard elastic behavior of PP/EVOH hollow fibers was comprehensively analyzed.The results showed that the hydrophilicity of PP/EVOH hollow fibers was effectively improved with the increase of EVOH content,and the maximum surface oxygen content of the fiber was 5.65wt%.After adding PP-g-MAH,the crystallization of the PP phase was hindered,resulting in weakening of the hard elasticity of the PP/EVOH hollow fibers.Although the addition of EVOH can play the role of heterogeneous nucleation and promote crystallization,PP/EVOH hollow fibers still showed good hard elasticity.However,the hard elasticity of PP/EVOH hollow fibers were still lower than that of pure PP hollow fiber.

关 键 词：聚丙烯 乙烯-乙烯醇共聚物 中空纤维 硬弹性行为 亲水性 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]