文献类型：期刊文献

英文题名：Synthesis of Monodisperse Styrene/Methyl Methacrylate/Acrylic Acid Latex Using Surfactant-Free Emulsion Copolymerization in Air

作者：Zhang, Shengmiao[1];Chen, Jianding[1];Taha, Mohamed[2]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Univ St Etienne, CNRS, Lab Rheol Mat Plast, UMR Ingn Mat Polymeres 5223,Fac Sci, F-42023 St Etienne 2, France

年份：2009

卷号：114

期号：3

起止页码：1598

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20093412265083);WOS:【SCI-EXPANDED(收录号:WOS:000269709700033)】；

基金：Contract grant sponsor: The National Nature Scientific Foundation of China; contract grant number: 30471682.Contract grant sponsor: Shanghai Leading Academic Discipline Project; contract grant number: B502.

语种：英文

外文关键词：surfactant-free emulsion polymerization; particle size distribution; molecular weight distribution; oxygen; high solids content

摘要：Monodisperse styrene/methyl methacrylate/acrylic acid (St/MMA/AA) copolymer microspheres have been prepared with surfactant-free emulsion polymerization in air. The presence of oxygen in the system not only caused an induction period but also decreased the average particle size (D-p). However increasing AA concentration ([AA]) gave a reduction in the induction period. The FTIR and NMR analysis of the latex copolymer confirmed that the correlation of the copolymer compositions with the feed compositions was much better at the lower [AA] than at the higher levels. The AA contents of the copolymers obtained in air were much lower than those of the copolymers obtained under N-2 protection. Decreasing [AA] led to decrease in the copolymer molecular weight and broadening of the molecular weight distribution, but the particle size distribution (delta/D-p) was unaffected. In addition, the average particle diameter (D-p) was proportional to [AA](-0-2.55), and increasing comonomers feed content caused linear increase of D-p, and a monodisperse sample with final solids contents up to 34.2 wt % was obtained. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 114: 1598-1605, 2009