Non-isothermal crystallization behaviors and spherulitic morphology of poly(lactic acid) nucleated by a novel nucleating agent

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• 作者：Chenglang Li ; Qiang Dou ; Zhifei Bai…
• 关键词：Poly(lactic acid) ; Nucleating agent ; Crystallization ; Morphology ; Non ; isothermal crystallization kinetics
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：122
• 期：1
• 页码：407-417
• 全文大小：1,752 KB
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• 作者单位：Chenglang Li (1)
  Qiang Dou (1)
  Zhifei Bai (1)
  Quliang Lu (2)
  
  1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China
  2. College of Chengxian, Southeast University, Nanjing, 210088, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Sciences
  Polymer Sciences
  Physical Chemistry
  Inorganic Chemistry
  Measurement Science and Instrumentation
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1572-8943

文摘

The effect of cadmium phenylmalonate (PMA-Cd) as a novel nucleating agent on the crystallization behaviors and spherulitic morphology of poly(lactic acid) (PLA) as well as non-isothermal crystallization kinetics of the nucleated PLA were studied by means of differential scanning calorimetry and polarized light microscopy. The results showed that PMA-Cd served as an effective nucleating agent to accelerate the crystallization rate of PLA. The presence of PMA-Cd significantly increased the number and decreased the size of the spherulites. The non-isothermal crystallization kinetics of the nucleated PLA was well described by Mo’s model. The activation energies (ΔE) of non-isothermal crystallization were calculated by Kissinger’s method. The crystallization rate of PLA/0.5 % PMA-Cd sample was faster than that of PLA/0.2 % PMA-Cd sample, while the ΔE of the former was greater than that of the latter. The nucleation mechanism between PMA-Cd and PLA was satisfactorily explained by dimensional lattice-matching criterion. Keywords Poly(lactic acid) Nucleating agent Crystallization Morphology Non-isothermal crystallization kinetics