Effect of nucleating agents on the strain-induced crystallization of poly(L-lactide)

被引：30
|
作者：
Yin, Yongai [1 ]
Zhang, Xiuqin [2 ]
Song, Yan [1 ]
de Vos, Sicco [3 ]
Wang, Ruyin [4 ]
Joziasse, Cornelis A. P. [3 ]
Liu, Guoming [1 ]
Wang, Dujin [1 ]
机构：
[1] Chinese Acad Sci, Inst Chem, CAS Key Lab Engn Plast, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
[2] Beijing Inst Fash Technol, Sch Mat Sci & Engn, Beijing Key Lab Clothing Mat R&D & Assessment, Beijing 100029, Peoples R China
[3] Corbion Purac, NL-4200 AA Gorinchem, Netherlands
[4] Corbion Purac China, Unit 08 09, Shanghai 201100, Peoples R China
来源：
POLYMER | 2015年 / 65卷
基金：
中国国家自然科学基金;
关键词：
Poly(L-lactide); Nucleating effect; Strain-induced crystallization; L-LACTIC ACID; POLY(LACTIC ACID); AMORPHOUS POLY(ETHYLENE-TEREPHTHALATE); STEREOCOMPLEX CRYSTALLITES; POLYLACTIDE STEREOCOMPLEX; POLY(D-LACTIC ACID); MELTING BEHAVIOR; DEFORMATION; ORIENTATION; TEMPERATURE;
D O I：
10.1016/j.polymer.2015.03.061
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
This work examined the effect of nucleating agents on the strain-induced crystallization of poly(L-lactide) (PLLA). Talc and poly(D-lactide) (PDLA) were used as the nucleating agents of PLLA. Wide angle X-ray scattering (WAXS) revealed that the original injection molded specimens of nucleated PLLA blends were free of PLLA a crystal. The structural evolution during uniaxial stretching of neat and nucleated PLLA above the glass transition temperature was investigated by in-situ WAXS. It was observed that the nucleating agents significantly accelerated the crystallization of PLLA during stretching. The accelerating effect for the PLLA crystallization during stretching increased in the following order: PDLA/talc > PDIA > talc. In step-strain measurements with a high stretching speed, the effect of nucleating agents on the crystallization of PLLA showed a strain-dependence. The enhancement of crystallization by nucleating agents was remarkable at 200% strain. However, with 500% strain, the strain-induced crystallization was dominant and the effect of nucleating agents on crystallization of PLLA was not obvious. The results were analyzed considering the nucleating effect of nucleating agents on PLLA. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：223 / 232
页数：10
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