文献类型：期刊文献

英文题名：Antishrinking Strategy of Microcellular Thermoplastic Polyurethane by Comprehensive Modeling Analysis

作者：Chen, Yichong[1];Li, Dongyang[1];Zhang, Hong[1];Ling, Yijie[1];Wu, Kaiwen[1];Liu, Tao[1];Hu, Dongdong[1];Zhao, Ling[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Xinjiang Univ, Coll Chem Engn, Urumqi 830046, Peoples R China

年份：2021

卷号：60

期号：19

起止页码：7155

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20212210422579);WOS:【SCI-EXPANDED(收录号:WOS:000655249200024)】；

基金：This work was supported by the National Key Research and Development Program of China (2016YFB0302200), the Fundamental Research Funds for the Central Universities (JKA012011002), and the 111 Project (B20031).

语种：英文

外文关键词：Tensile testing - Reinforced plastics - Shrinkage - Foams - Polyurethanes - Supercritical fluid extraction

摘要：A comprehensive model for shrinkage behavior of soft thermoplastic polyurethane (TPU) elastomer foams has been built, which involves in situ tensile testing of TPU under different carbon dioxide (CO2) plasticization pressures and antishrinking abilities of different cell shapes of circular, square, and hexagonal evaluated by a three-order Ogden hyperelastic equation. Combined with the nitrogen (N-2)-assisted supercritical carbon dioxide CO2 foaming and aging experimental results, it was found that the hexagonal cells can match the actual shrinkage process well, and no less than 50% N-2 content remaining in cells can effectively improve the antishrinking ability of TPU foams. According to the principle that there is no pressure difference between inside and outside foam, a feasible method of aging TPU foam under a variable ambient vacuum to reduce the shrinkage ratio was proposed, simulated, and proved.