文献类型：期刊文献

英文题名：Comprehensive analysis of mechanical properties of microcellular polypropylene: Experiment and simulation

作者：Chen, Yichong[1,3];Yu, Jiabao[1,2];Ling, Yijie[1];Yao, Shun[1];Jiang, Xiulei[2];Hu, Dongdong[1];Wang, Huifeng[3];Zhao, Ling[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Shincell New Mat Co Ltd, Suzhou 215000, Peoples R China;[3]East China Univ Sci & Technol, Sch Informat Sci & Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：116

外文期刊名：POLYMER TESTING

收录：;EI(收录号：20224112855233);WOS:【SCI-EXPANDED(收录号:WOS:000876389000001)】；

基金：Acknowledgments This work was supported by the Fundamental Research Funds for the Central Universities (JKA012011002) , and the 111 Project (B20031) .

语种：英文

外文关键词：Microcellular polypropylene; Mechanical property; Bubble structure; Finite element calculation; Counter -acting force of gas

摘要：A series of microcellular polypropylene (PP) with different bubble size and expansion ratio were prepared by supercritical CO2 moulding compression foaming, and their compressive, flexural and tensile properties were measured. A comprehensive calculation model for the mechanical properties of polymer foam based on tetra -decahedron structure was further established, and the error between the simulation results and the experimental results is less than 25%. Based on the model, the contributions of the elastic stress of polymer matrix and counter-acting force of gas to the elastic modulus were quantitatively analyzed for the first time. The results show that the smaller bubble size can improve the compressive elastic modulus and flexural elastic modulus but has little effect on the tensile elastic modulus. At the same time, the counter-acting force of gas has a positive effect on the compressive elastic modulus, but has a weakening effect on the tensile elastic modulus, and has almost no effect on the flexural elastic modulus. Finally, the generality of the above model is verified by the prediction for elastic modulus of different polymer foams.