Crystallization and Biodegradation of Polylactide/Carbon Nanotube Composites

被引：83

作者：

Wu, Defeng ^{[1
,2
]}

Wu, Liang ^{[1
,2
]}

Zhou, Weidong ^{[3
]}

Zhang, Ming ^{[1
,2
]}

Yang, Tao ^{[1
,2
]}

机构：

[1] Yangzhou Univ, Sch Chem & Chem Engn, Jiangsu 225002, Peoples R China

[2] Prov Key Labs Environm Mat & Engn, Jiangsu 225002, Peoples R China

[3] Yangzhou Univ, Testing Ctr, Jiangsu 225002, Peoples R China

来源：

POLYMER ENGINEERING AND SCIENCE | 2010年 / 50卷 / 09期

基金：

中国国家自然科学基金;

关键词：

MULTIWALLED CARBON NANOTUBES; COLD-CRYSTALLIZATION; SPHERULITE GROWTH; ISOTHERMAL CRYSTALLIZATION; SILICATE NANOCOMPOSITES; POLYMER NANOCOMPOSITES; MELT-CRYSTALLIZATION; THERMAL-STABILITY; BEHAVIOR; KINETICS;

D O I：

10.1002/pen.21695

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The crystallization behavior of polylactide/carbon nanotube composites was studied using differential scanning calorimeter and polarized optical microscope. The nucleation mechanisms and the crystallization kinetics were explored. The results show that the presence of nanotubes has nucleating effect on both the melt crystallization and the cold crystallization of PLA. However, the nanotubes also play the role of physical barrier, impeding the crystal growth dynamically. In the experimental range of temperatures, the presence of nanotubes accelerates the melt crystallization, while retards the overall kinetics of the cold crystallization. The biodegradability of the samples with various crystallization histories was then further examined. The results show that the presence of nanotubes reduces the biodegradation rate of PLA, and the amorphous sample shows the highest degradation levels. Moreover, a lower degradation level is observed both on the surface and inside the sample with melt crystallization history in contrast to the one with cold crystallization history. POLYM. ENG. SCI., 50:1721-1733, 2010. (C) 2010 Society of Plastics Engineers

引用

页码：1721 / 1733

页数：13

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