Crystallization Kinetics Study of Poly(L-lactic acid)/Carbon Nanotubes Nanocomposites

被引：49

作者：

Shieh, Yeong-Tarng ^{[1
]}

Twu, Yawo-Kuo ^{[2
]}

Su, Chean-Cheng ^{[1
]}

Lin, Rong-Hsien ^{[3
]}

Liu, Gin-Lung ^{[4
]}

机构：

[1] Natl Univ Kaohsiung, Dept Chem & Mat Engn, Kaohsiung 811, Taiwan

[2] Dayeh Univ, Dept Bioind Technol, Dacun 51591, Changhua, Taiwan

[3] Natl Kaohsiung Univ Appl Sci, Dept Chem & Mat Engn, Kaohsiung 807, Taiwan

[4] Natl Yunlin Univ Sci & Technol, Dept Chem & Mat Engn, Touliu 640, Yunlin, Taiwan

来源：

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 2010年 / 48卷 / 09期

关键词：

carbon nanotubes; crystallization kinetics; crystallization; differential scanning calorimetry (DSC); nanocomposites; poly(L-lactic acid); polyesters; MULTIWALLED CARBON NANOTUBES; BIODEGRADABLE POLY(L-LACTIDE); ISOTHERMAL CRYSTALLIZATION; HYDROLYTIC DEGRADATION; MECHANICAL PROPERTY; MELTING BEHAVIOR; COMPOSITES; ACID); MORPHOLOGY; FUNCTIONALIZATION;

D O I：

10.1002/polb.21986

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Effects of carbon nanotubes (CNT) on the isothermal crystallization kinetics of poly(L-lactic acid) (PLLA) were quantitatively investigated using the Avrami equation and the secondary nucleation theory of Lauritzen and Hoffman. CNT via grafting modification with PLLA could well disperse in the PLLA matrix and give significantly enhanced crystallization rate and crystallinity of PLLA as analyzed by differential scanning calorimetry and polarized optical microscopy. Analysis of isothermal crystallization kinetics using the Avrami equation demonstrated that CNT significantly enhanced the bulk crystallization of PLLA. Analysis of spherulite growth kinetics using the secondary nucleation theory of Lauritzen and Hoffman found that CNT could expand the temperature range of the crystallization regime III of PLLA. Values of the nucleation constant (K(g)) in crystallization regimes III and II of PLLA both increased with increasing CNT contents. The K(g) III/K(g) II ratios were found to be close to the theoretical value 2 hut were not clearly found to depend on the CNT contents. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 983-989, 2010

引用

页码：983 / 989

页数：7

共 27 条

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