文献类型：期刊文献

英文题名：Exploration of CO2-Philicity of Poly(vinyl acetate-co-alkyl vinyl ether) through Molecular Modeling and Dissolution Behavior Measurement

作者：Hu, Dongdong[1];Sun, Shaojun[1];Yuan, Pei-Qing[1];Zhao, Ling[1];Liu, Tao[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：119

期号：38

起止页码：12490

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY B

收录：;EI(收录号：20154001321312);WOS:【SCI-EXPANDED(收录号:WOS:000361921400014)】；

基金：This work was supported by the National Science Foundation of China (21376087), Research Fund for the Doctoral Program of Higher Education of China (20130074110013), the 111 Project (B08021), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Polyvinyl acetates - Molecular dynamics - Dissolution - Molecular modeling - Ethers

摘要：Hydrocarbon CO2-philes are of great interest for use in expanding CO2 applications as a green solvent. In this work, multiscale molecular modeling and dissolution behavior measurement were both applied to explore CO2-philicity of the poly(vinyl acetate) (PVAc)-based copolymer. Introduction of a favorable comonomer, i.e., vinyl ethyl ether (VEE), could significantly reduce the polymer polymer interaction on the premise that the polymer-CO2 interaction was not weakened but enhanced. The ab initio calculated interaction of the model molecules with CO2 demonstrated that the ether group in VEE or VBE was the suitable CO2-philic segment. From the molecular dynamics (MD) simulations of polymer/CO2 systems, the interaction energy and Flory-Huggins parameter (chi(12)) of poly(VAc-alt-VEE)/CO2 supported that poly(VAc-alt-VEE) possessed better CO2-philicity than PVAc. The dissolution behaviors of the synthesized poly(VAc-co-alkyl vinyl ether) copolymers in CO2 showed the best CO2-phile had the VEE content of about 34 mol %. The MD simulations also indicated that the interaction of random poly(VAc-co-VEE) containing about 30 mol % VEE with CO2 was the strongest and the chi(12) was the smallest in these polymer/CO2 systems. Not only could the VEE monomer reduce the polymer polymer interaction, but it could also enhance the polymer-CO2 interaction with an optimized composition. Introducing a suitable comonomer with a certain composition might be a promising strategy to form the synergistic effect of polymer polymer interaction and polymer-CO2 interaction for screening the hydrocarbon CO2-philes.