左旋聚乳酸/右旋聚乳酸无规共聚物的共混纤维的制备与性能

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英文篇名：Preparation and Properties of Poly (L-Lactide)/Poly (D-Lacide) Random Copolymer Blend Fibers 作者：齐悦 ; 李琦 ; 杨博 ; 李晓露 ; 张秀芹 英文作者：QI Yue;LI Qi;YANG Bo;LI Xiao-lu;ZHANG Xiu-qin;Beijing Key Laboratory of Clothing Materials R&D and Assessment,Beijing Engineering Research Center of Textile Nanofiber,Beijing Institute of Fashion Technology; 关键词：左旋聚乳酸 ; 共混纤维 ; 牵伸倍数 ; 右旋聚乳酸无规共聚物 英文关键词：poly(L-lactide);;poly(D-lacide)-r-poly(ε-caprolactone);;blend fiber;;drafting ratio 中文刊名：BFXB 英文刊名：Journal of Beijing Institute of Clothing Technology(Natural Science Edition) 机构：北京服装学院服装材料研究开发与评价北京市重点实验室北京市纺织纳米纤维工程技术研究中心; 出版日期：2019-03-30 出版单位：北京服装学院学报(自然科学版) 年：2019 期：v.39;No.103 基金：国家自然基金委项目(51673003)资助 语种：中文; 页：BFXB201901003 页数：7 CN：01 ISSN：11-2523/TS 分类号：18-24

摘要

采用右旋聚乳酸-己内酯无规共聚物(PDLA-r-PCL)对左旋聚乳酸(PLLA)进行改性,通过熔融纺丝-牵伸两步法分别制备PLLA、PLLA/PDLA-r-PCL共混纤维;采用差示扫描量热分析、毛细管流变仪、扫描电镜、广角X射线衍射及力学性能测试等方法对共混物及其共混纤维的结晶行为、热性能和力学性能进行研究。结果表明:m(PLLA)/m(PDLA-r-PCL)为95/5、90/10时,共混物具有较好的可纺性,热牵伸3倍后,纤维充分取向结晶,形成结构稳定的纤维;在相同纺丝条件下,PLLA/PDLA-r-PCL共混纤维的强度和韧性高于纯PLLA纤维。
        Poly(L-Lactide)/Poly(D-Lacide) random copolymer blend fibers were prepared by two-step melt spinning method from blends of Poly(L-lactide) and random copolymer of poly(D-lacide)-r-poly(ε-caprolactone)(PLLA/PDLA-r-PCL). The crystallization behavior, thermal and mechanical properties of the blends and the fibers were investigated by DSC, capillary rheometer, SEM, WAXS and mechanical tests. The results showed that the PLLA/PDLA-r-PCL(95/5) and PLLA/PDLA-r-PCL(90/10) blends had good spinnability. The PLLA/PDLA-r-PCL(95/5) fibers with a drafting ratio of 3 was fully oriented and showed a more stale structure. Under the same spinning conditions, the strength and toughness of PLLA/PDLA-r-PCL fibers were stronger than that of the pure PLLA fiber.

引文

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