Control of Crystal Morphology in Poly(L-lactide) by Adding Nucleating Agent

被引：219

作者：

Bai, Hongwei ^{[1
]}

Zhang, Weiyi ^{[1
]}

Deng, Hua ^{[1
]}

Zhang, Qin ^{[1
]}

Fu, Qiang ^{[1
]}

机构：

[1] Sichuan Univ, State Key Lab Polymer Mat Engn, Coll Polymer Sci & Engn, Chengdu 610065, Peoples R China

来源：

MACROMOLECULES | 2011年 / 44卷 / 06期

基金：

中国国家自然科学基金;

关键词：

ISOTACTIC POLYPROPYLENE; ENZYMATIC DEGRADATION; OPTICAL-PROPERTIES; PHASE-BEHAVIOR; BLENDS; BIOCOMPATIBILITY; CRYSTALLIZATION; STABILITY; SORBITOL; SHEAR;

D O I：

10.1021/ma102439t

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Derivative N,N',N''-tricyclohexyl-1,3,5-benzenetricarboxylamide (TMC-328) was considered as a model to tailor the crystal superstructure of poly(L-lactide) (PLLA), and three crystal morphologies including cone-like, shish-kebab, and needle-like structures were obtained using melt crystallization. Morphological observations of PLLA crystallites were conducted on a polarized optical microscopy equipped with a hot stage under crossed polarizers. PLLA shows a spherulitic crystal morphology and the crystal morphology for nucleated PLLA is clearly different from that of PLLA-0 and dependent on the loading levels of TMC-328 in PLLA. The results also show that only a fraction of TMC-328 molecules self-organize into some fine fibrils, and no stable physical network is formed upon cooling. The morphology of TMC-328 in PLLA melt varies with the increase of its concentrations, inducing three characteristic crystal morphologies.

引用

页码：1233 / 1237

页数：5

共 31 条

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