文献类型：期刊文献

英文题名：Crystallization Behavior of Poly(Lactic Acid) Filled with Modified Carbon Black

作者：Su, Zhizhong[1];Liu, Yongjun[1];Guo, Weihong[1];Li, Qiuying[1];Wu, Chifei[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2009

卷号：48

期号：4

起止页码：670

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

收录：;EI(收录号：20094712487113);WOS:【SCI-EXPANDED(收录号:WOS:000268578200003)】；

基金：The authors are grateful for the financial supports of the Key Project of National Natural Science Foundation of China (No. 50733001).

语种：英文

外文关键词：composite; crystallization behavior; modified carbon black; non-isothermal crystallization; nucleating activity; poly(lactic acid)

摘要：A novel method was employed to modify the surface of carbon black (CB) by an organic small molecule in a Haake Rheomix mixer The modified carbon black (MCB) was dispersed uniformly in poly(lactic acid; PLA). The crystallization behaviors of PLA, PLA/CB and PLA/MCB composites were investigated by differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS) and polarizing optical microscopy. It is found that the addition of CB or MCB can influence the crystallization behavior of PLA. PLA/MCB has a faster crystallization rate and higher crystallization peak temperature than PLA/CB. For non-isothermal studies, Jeziomy and Mo equations were employed. The Mo equation can well describe the non-isothermal crystallization of the three samples. For PLA/CB and PLA/MCB composites containing 3wt% fillers, the nucleating activity for CB is about 0.32, and about 0.16 for MCB. All these results show that MCB is an effective nucleating agent. PLA/MCB has a higher nucleation rate than PLA/CB because of the finer dispersed particles size and improved interaction between MCB and PLA.