文献类型：期刊文献

英文题名：Preparation and characterization of PLA foam chain extended through grafting octa(epoxycyclohexyl) POSS onto carbon nanotubes

作者：Liu, Wei Zhu, Xunxian Gao, Hongxiang Su, Xiangdong Wu, Xian

第一作者：刘伟

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

机构：[1]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, 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 550003, 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：2020

卷号：39

期号：3

起止页码：117-137

外文期刊名：CELLULAR POLYMERS

收录：;EI(收录号：20201308352422);Scopus(收录号：2-s2.0-85082199941);WOS:【SCI-EXPANDED(收录号:WOS:000526972600002)】；

基金：The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the National Natural Science Foundation of China (51703039) and the Special Project of Cultivating New Academic Seedlings and Exploring Innovation for the Guizhou Institute of Technology (QianKeHe [2017]5789-03).

语种：英文

外文关键词：PLA; foam; POSS; CNT; chain extender

摘要：Improving foamability of poly (lactic acid) (PLA) resin is a key issue for its critical foaming applications with high-performance and ultralow density. However, owing to the rheological nature of linear PLA chain structure with relatively low molecular weight, the overall foamability of PLA resin cannot meet the processing requirements of foaming purpose. Here, we describe a simple and versatile technique to prepare high foamability PLA resin by inducing chain extender through grafting octa(epoxycyclohexyl) polyhedral oligomeric silsesquioxanes (POSS) on carbon nanotubes (CNT). After the orderly assemble of the two nanoparticles, an obvious increase in melt elasticity of PLA is observed. The enhanced melt elasticity of PLA had a significant effect on controlling subsequent foaming behavior. Thus, a homogeneous and finer cellular morphology of PLA rigid foam was obtained with a proper content of CNT-POSS. Eventually, the expansion ratio of chain-extended PLA foam was 13 times higher than that of unmodified PLA foam. The proposed design methodology will potentially pave a way for designing and preparing high-performance PLA rigid foam products.