Preparation of stereocomplex polylactic acid fiber and evolution of crystal structures

被引：4

作者：

Zhu, Jintang ^{[1
]}

Cui, Huashuai ^{[1
]}

Shi, Xianning ^{[1
]}

Cui, Ning ^{[1
]}

Li, Jie ^{[1
]}

Huang, Qing ^{[1
]}

Wu, Pengfei ^{[1
]}

机构：

[1] China Text Acad, State Key Lab Biobased Fiber Mfg Technol, Beijing 100025, Peoples R China

来源：

MATERIALS LETTERS | 2023年 / 349卷

关键词：

Stereocomplex; Polylactic acid fiber; Melt spinning; Crystal growth; Thermal analysis; ENANTIOMERIC POLY(LACTIC ACID)S; BEHAVIOR;

D O I：

10.1016/j.matlet.2023.134744

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Stereocomplex polylactic acid (ScPLA) fibers were successfully prepared by mixing equal mass melts of poly(Llactic acid) (PLLA) and poly(D-lactic acid) (PDLA) by melt spinning process. The evolution of crystal structures of ScPLA fibers was investigated by differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD). The results show that the homogeneous crystal (Hc) will be converted to stereocomplex crystal (Sc) as the heat setting temperature (HT) increases. The crystallinity curves of Hc and Sc cross into an "X" and the cross point is near the melting point of the Hc. The temperature range to form ScPLA fiber with fully stereoscomplex structures is 187 & DEG;C to 197 & DEG;C and the maximum Sc content is about 60%.

引用

页数：4

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