Influence of Stretching on Crystallization Behavior of Poly (L-lactic acid)

被引：0
|
作者：
Xing Qian [1 ,2 ]
Zhang Xiu-Qin [1 ]
Luo Fa-Liang [1 ,2 ,3 ]
Liu Guo-Ming [1 ,2 ]
Wang Du-Jin [1 ]
机构：
[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, CAS Key Lab Engn Plast, Inst Chem, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
[3] Ningxia Univ, Key Lab Energy & Resource Ningxia, Yinchuan 750021, Peoples R China
来源：
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2011年 / 32卷 / 04期
关键词：
Poly (L-latic acid) (PLLA); Stretching; Crystallization; MULTIPLE MELTING BEHAVIOR; POLY(L-LACTIC ACID); SYNDIOTACTIC POLYPROPYLENE; EPITAXIAL CRYSTALLIZATION; THERMAL-PROPERTIES; X-RAY; COPOLYMERS; TRANSFORMATION; TRANSITION; CRYSTALS;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The influence of stretching under different temperatures on the crystallization behavior of poly( L-lactic acid) (PLLA) was investigated by the combinational investigation of Frill, DSc, and XRD It was found that stretching could remarkably improve the crystallization rate and crystallinity of PLLA Stretched at a draw ratio of 3, PLLA forms alpha-form crystals in the temperature range of 90-95 degrees C. Further increasing the draw ratio, the crystallinity remains almost constant. With increasing the stretching temperature up to 105 degrees C, the PLLA films cannot crystallize under stretching. Contrary to the unstretched PLLA film, the stretched PLLA films gradually crystallize during the heating process, indicating that pre-stretching can change the crystallization behavior of PLLA.
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页码：971 / 977
页数：7
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