Miscibility and Isothermal Crystallization of Poly（L-lactide） and Poly（trimethylene carbonate） Blends

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 transit...

Full description

Saved in:
Bibliographic Details
Published in:高分子科学：英文版 2015 (3), p.499-507
Main Author: Li-fen Zhao Jun Cheng Xiu-juan Tian Ru-liang Zhang
Format: Article
Language:English
Subjects:
L-丙交酯
亚甲基
共混物
差示扫描量热法
混溶性
玻璃化转变温度
碳酸酯
等温结晶动力学
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 （≤ 20%）. However, when the PTMC content was high （≥ 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.
ISSN:0256-7679
1439-6203