文献类型：期刊文献

英文题名：Multiple Melting Behavior of Poly(lactic acid) Filled with Modified Carbon Black

作者：Su, Zhizhong[2];Li, Qiuying[2];Liu, Yongjun[2];Hu, Guo-Hua[1,3];Wu, Chifei[2]

机构：[1]Nancy Univ, CNRS, Lab Sci Genie Chim, F-54001 Nancy, France;[2]E China Univ Sci & Technol, Sch Mat Sci & Engn, Polymer Alloy Lab, Shanghai 200237, Peoples R China;[3]Maison Univ, Inst Univ France, F-75005 Paris, France

年份：2009

卷号：47

期号：20

起止页码：1971

外文期刊名：JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS

收录：;EI(收录号：20094212381790);WOS:【SCI-EXPANDED(收录号:WOS:000270692400002)】；

基金：The authors thank Dr. Yongjin Li of National Institute of Advanced Industrial Science and Technology (AIST) for help of SAXS measurements. They thank the financial supports of the Key Project of National Natural Science Foundation of China (Nos. 50733001 and 20674018).

语种：英文

外文关键词：crystallization; modified carbon black; multiple melting behavior; poly(lactic acid); polylactide; SAXS; WAXS

摘要：Two melting peaks are generally observed in a heating scan for isothermally crystallized poly(lactic acid) (PLA)/carbon black (CB) and PLA/modified carbon black (MCB) composites. To investigate the origin of the above double melting behavior, the melting behavior after isothermal crystallization was analyzed with differential scanning calorimetry, wide-angle X-ray diffraction, and small angel X-ray scattering techniques. The double melting of the crystallized samples can be explained by the model of two populations of lamellae, the double peaks of low and high temperatures are contributed to the melting of the small lamellae produced by secondary crystallization and that of the major crystals formed in the primary crystallization process, respectively. Spherulitic growth rates of the neat PLA and PLA/MCB composite were analyzed and the occurrence of a regime transition was demonstrated. For the PLA, a clear regime transition was observed at around 125 degrees C. For the PLA/MCB, it occurred at 130 degrees C. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 47:1971-1980, 2009