Mesophase formation and its thermal transition in the stretched glassy polylactide revealed by infrared spectroscopy

被引：81
作者：
Lv, Ruihua [1 ]
Na, Bing [1 ]
Tian, Nana [1 ]
Zou, Shufen [1 ]
Li, Zhujun [1 ]
Jiang, Shichun [2 ]
机构：
[1] E China Inst Technol, Sch Biol Chem & Mat Sci, Key Lab Radioact Geol & Explorat Technol Fundamen, Fuzhou 344000, Peoples R China
[2] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
来源：
POLYMER | 2011年 / 52卷 / 21期
基金：
中国国家自然科学基金;
关键词：
Mesophase; Polylactide; FTIR; POLY(LACTIC ACID); ORIENTED CRYSTALLIZATION; DIMENSIONAL STABILITY; COLD-CRYSTALLIZATION; PHASE; ORIENTATION; BEHAVIOR; POLY(ETHYLENE-TEREPHTHALATE); POLY(L-LACTIDE); DEFORMATION;
D O I：
10.1016/j.polymer.2011.08.023
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The structural development in the glassy polylactide during stretching and subsequent heating has been investigated by Fourier transform infrared spectroscopy. It is indicated that only when molecular chains in the amorphous phase approach their finite extensibility beyond a critical strain of about 1, accompanied by remarkable conformational ordering, can cohesive mesophase with certain molecular ordering be brought out to trigger strain-induced crystallization. Upon heating cohesive mesophase endures melting during glass transition region where an endothermic peak is observed, and the extent of melting relies on its initial thermal stability and is in particular affected by the subsequent advent of strain-induced crystallization. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4979 / 4984
页数：6
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