文献类型：期刊文献

英文题名：Effect of chain topological structure on the crystallization, rheological behavior and foamability of TPEE using supercritical CO2 as a blowing agent

作者：Jiang, Rui[1,2];Yao, Shun[1];Chen, Yichong[1];Liu, Tao[1];Xu, Zhimei[1];Park, Chul B.[2];Zhao, Ling[1,3]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Univ Toronto, Dept Mech & Ind Engn, Microcellular Plast Mfg Lab, Toronto, ON M5S 3G8, Canada;[3]Xinjiang Univ, Coll Chem & Chem Engn, Urumqi 830046, Peoples R China

年份：2019

卷号：147

起止页码：48

外文期刊名：JOURNAL OF SUPERCRITICAL FLUIDS

收录：;EI(收录号：20190806525638);WOS:【SCI-EXPANDED(收录号:WOS:000462690700007)】；

基金：This research is supported by the National Key Research and Development Program of China (2016YFB0302200).

语种：英文

外文关键词：Thermoplastic polyether ester elastomer (TPEE); Chain topological structure; Rheology; Foamability; Supercritical carbon dioxide

摘要：Thermoplastic polyether ester elastomer (TPEE) has been reacted with different multi-functional group modifiers, such as 2,2'-bis(2-oxazoline) (2,2'-BOZ) and triglycidyl isocyanurate (TGIC), to create long chain TPEE and highly branched TPEE respectively by reactive processing. Both chain extension and branching processes could improve the complex viscosity and modulus, but TPEE with a branched structure showed distinguished strain-hardening behavior. The branched structure can also accelerate crystallization processes. In the foaming process, TPEE with branched chains have a higher expansion ratio, higher cell density and wider foaming window when compared with TPEE with long chains. The branched structure can prevent cells from collapsing to obtain foamed TPEE with high expansion ratios ranging from 1.5 folds to 16 folds, cell diameters ranging from 3 mu m to 13 mu m and a cell density between 3.6 x 10(8) cells/cm(3) and 7.1 x 10(9) cells/cm(3).