文献类型：期刊文献

英文题名：Effect of stereocomplex crystal on foaming behavior and sintering of poly(lactic acid) bead foams

作者：Liu, Wei He, Shicheng Yang, Yujie

第一作者：刘伟;刘卫

通信作者：Liu, W[1]|[14440e1cfacde39bad4ab]刘伟;

机构：[1]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang, Guizhou, Peoples R China;[2]Guizhou Inst Technol, Key Lab Light Met Mat Proc Technol Guizhou Prov, Guiyang, Guizhou, Peoples R China

第一机构：贵州理工学院材料与冶金工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang, Guizhou, Peoples R China.|贵州理工学院材料与冶金工程学院;贵州理工学院;

年份：2019

卷号：68

期号：3

起止页码：516-526

外文期刊名：POLYMER INTERNATIONAL

收录：;EI(收录号：20185106277087);Scopus(收录号：2-s2.0-85058703578);WOS:【SCI-EXPANDED(收录号:WOS:000458581400024)】；

基金：This work was supported by the National Natural Science Foundation of China (grant no. 51703039).

语种：英文

外文关键词：PLA; bead foam; stereocomplex

摘要：Poly(lactic acid) (PLA) bead foams with stereocomplex (Sc)/alpha crystals were prepared by melt mixing and solid-state foaming methods, independently. A systematic method was applied to evaluate the effect of Sc/alpha crystals on rheological properties and foaming behavior of PLA. The results indicated that the presence of Sc/alpha crystals affected the foaming behavior and the melt elasticity of PLA. Hence, the enhanced rheological properties of PLA had a significant effect on controlling the foaming behavior. As a result, PLA bead foam with an expansion ratio of 24-fold was developed. And, the presence of Sc/alpha crystals could also facilitate the sintering behavior and broaden the sintering process window. Sintered PLA bead foam with finer cellular morphology and strong sintering effect was obtained by inducing an appropriate Sc/alpha crystalline structure. (c) 2018 Society of Chemical Industry