Improve the thermal and mechanical properties of poly(L-lactide) by forming nanocomposites with pristine vermiculite

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• 作者：Hai-mu Ye 叶海暿/a> ; Kai Hou ; Qiong Zhou
• 关键词：Poly(L ; lactide) ; Vermiculite ; Crystallization behavior ; Epitaxial crystallization ; Nucleating agent
• 刊名：Chinese Journal of Polymer Science
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：34
• 期：1
• 页码：1-12
• 全文大小：1,958 KB
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• 作者单位：Hai-mu Ye 叶海木 (1)
  Kai Hou (1)
  Qiong Zhou (1)
  
  1. Department of Materials Science and Engineering, Beijing Key Laboratory of Failure, Corrosion and Protection of Oil/Gas Facilities, China University of Petroleum, Beijing, 102249, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Condensed Matter Physics
  Industrial Chemistry and Chemical Engineering
  Polymer Sciences
  Characterization and Evaluation of Materials
  
• 出版者：Chinese Chemical Society and Institute of Chemistry, CAS, co-published with Springer
• ISSN：1439-6203

文摘

Poly(L-lactide) (PLLA)/pristine vermiculite nanocomposites were prepared by melt blending in a twin-screw extruder, and the detailed information of vermiculite dispersion state and effect of vermiculite on thermal and mechanical properties were systematically studied. The results show that the dispersion of vermiculite in the matrix is quite well when the loading content does not exceed 3 wt%. Pristine vermiculite can obviously improve the melt-crystallization temperature during the nonisothermal crystallization. Both crystallization time span and spherulitic size of PLLA decrease with the increasing amount of vermiculite under isothermal crystallization condition by enhancing the primary nucleation of PLLA. And the adding vermiculite can also improve the tensile modulus and Izod impact strength of PLLA. The intrinsic mechanism for the nucleating effect of vermiculite on PLLA is proposed to be the epitaxial crystallization and specific interaction between vermiculite and PLLA.