The Crystallization Behavior of L-Poly(lactic acid)/Polypropylene Blends:The Acceleration for Both L-Poly(lactic acid)and Polypropylene  

作　　者：Shuang-Cheng Li Wei-Jia Zhou Wen-Jie Wu Jun Shao Shui-Liang Chen Hao-Qing Hou Sheng Xiang 

机构地区：[1]College of Chemistry&Chemical Engineering and Nanofiber Engineering Center of Jiangxi Province,Jiangxi Normal University,Nanchang,330022,China [2]National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education,Jiangxi Normal University,Nanchang,330022,China [3]Wenzhou Institute,University of Chinese Academy of Sciences,Wenzhou,325001,China

出　　处：《Chinese Journal of Polymer Science》2024年第6期775-786,共12页高分子科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51403089 and 21574060);the Major Special Projects of Jiangxi Provincial Department of Science and Technology(No.20114ABF05100);the Project of Jiangxi Provincial Department of Education(No.GJJ170229);the China Postdoctoral Science Foundation(No.2019M652282);the Postdoctoral Science Foundation of Jiangxi Province(No.2018KY37);the Technology Plan Landing Project of Jiangxi Provincial Department of Education(No.GCJ2011-243).

摘　　要：For a polymer/polymer dismissible blend with two crystallizable components,the crystallization behavior of different components and the reciprocal influences between different crystals are interesting and important,but did not investigate in detail.In this study,the L-poly(lactic acid)/polypropylene(PLLA/PP)blends with different weight ratios were prepared by melt mixing and the crystallization behavior of the blends were investigated.Results showed that the crystalline structures of PLLA and PP were not altered by the composition.For the crystallization of PLLA,both the diffusion of chain segments and crystallization rate were enhanced under the existence of PP crystals.For the crystallization of PP,its crystallization rate was depressed under the existence of amorphous PLLA molecular chains.When the PP crystallized from the existence of PLLA crystals,although the diffusion rate of PP was reduced by PLLA crystals,the nucleation positions were obviously enhanced,which accelerated the formation of PP crystals.This investigation would supply more basic data for the application of PLLA/PP blend.

关 键 词：L-poly(lactic acid) POLYPROPYLENE BLENDS Crystalization behavior Crystallization acceleration 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]