Miscibility and isothermal crystallization of poly(L-lactide) and poly(trimethylene carbonate) blends

被引：9
|
作者：
Zhao, Li-fen [1 ]
Cheng, Jun [1 ]
Tian, Xiu-juan [1 ]
Zhang, Ru-liang [1 ]
机构：
[1] Shandong Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266590, Peoples R China
来源：
CHINESE JOURNAL OF POLYMER SCIENCE | 2015年 / 33卷 / 03期
关键词：
Poly(L-lactide); Poly(trimethylene carbonate); Miscibility; Crystal kinetics; POLY(BUTYLENE ADIPATE); MECHANICAL-PROPERTIES; MORPHOLOGY; KINETICS; BEHAVIOR; (CO)POLYMERS; POLYLACTIDE;
D O I：
10.1007/s10118-015-1604-4
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Miscibility, isothermal crystallization kinetics, and morphology of poly(L-lactide)/poly(trimethylene carbonate) (PLLA/PTMC) crystalline/amorphous blends were studied by differential scanning calorimetry (DSC) and optical microscopy (OM). The heterogeneity of OM images and an unchanged glass transition temperature showed that PLLA was immiscible with PTMC. During isothermal crystallization, the crystallization rate of PLLA improved when the PTMC content was low (a parts per thousand currency sign 20%). However, when the PTMC content was high (a parts per thousand yen 30%), the crystallization rate decreased significantly. The reason of these nonlinear changes in crystal kinetics was analyzed according to the nucleation and growth process by virtue of a microscope heating stage. The isothermal crystallization morphologies of the blends were also studied by polarized optical microscopy and the results confirmed the conclusions obtained from crystallization kinetics.
引用
收藏
页码：499 / 507
页数：9
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