文献类型：期刊文献

中文题名：The Surface Properties of PAVAc Prepared by Dispersion Polymerization in ScCO_2

英文题名：The surface properties of PAVAc prepared by dispersion polymerization in ScCO2

作者：Yang, Ya-Jun[1,2]; Wang, Zi[1,2]; Hu, Chun-Pu[1,2]; Dong, Qing-Zhi[1,2]

机构：[1] Key Laboratory for Ultrafine Materials, Ministry of Education, Shanghai 200237, China; [2] School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2008

卷号：25

期号：1

起止页码：53

中文期刊名：Journal of Donghua University(English Edition)

外文期刊名：Journal of Donghua University (English Edition)

收录：EI(收录号：20083311457026);Scopus

基金：National Natural Science Foundation of China (No20674017)

语种：英文

中文关键词：PAVAc ; dispersion polymerization ; acrylonitrile; vinyl acetate; surface free energy ; ScCO2

外文关键词：Dispersions - Free energy - Monomers - Surface properties - Polyvinyl acetates - Supercritical fluid extraction - Copolymerization

摘要：Dispersion copolymerization of acryionitrile-vinyi acetate （AN-VAc） has been successfully performed in supercriticai carbon dioxide （ScCO2） with a series of iipophilic/CO2-philic diblock copolymers, such as poly（ styrener-acrylonitrile）-b- poly （ 1, 1, 2, 2-tetrahydroperfluorooctyl methacrylate） （PSAN-b-PFOMA）, as steric stabilizers. The structure and the particle morphology of the product were characterised by FT-IR and SEM. In addition, the effects of the stabilizer on the surface properties of the products were investigated in detail. Results indicate that the surface free energy of the poly （AN-r-VAc） （PAVAc） film decreases dramatically because of the existence of the stabilizer. And, when the initial concentration of the monomer was 10% （the mass （g） of monomer to the volume （mL） of ScCO2 ） the optimal concentration of the stabilizer is about 5% （w/w% to monomers）.
Dispersion copolymerization of acrylonitrile-vinyl acetate (AN-VAc) has been successfully performed in supercritical carbon dioxide (ScCO2) with a series of lipophilic/CO2-philic diblock copolymers, such as poly( styyrene-r-acrylonitrile)-b- poly(1, 1, 2, 2-tetrahydroperfluorooctyl methacrylate) (PSAN-b-PFOMA), as steric stabilizers. The structure and the particle morphology of the product were characterised by FT-IR and SEM. In addition, the effects of the stabilizer on the surface properties of the products were investigated in detail. Results indicate that the surface free energy of the poly (AN-r-VAc) (PAVAc) film decreases dramatically because of the existence of the stabilizer. And, when the initial concentration of the monomer was 10% (the mass (g) of monomer to the volume (mL) of ScCO2) the optimal concentration of the stabilizer is about 5% (w/w% to monomers).