中华医学超声杂志

应用化学 ›› 1988, Vol. 0 ›› Issue (5): 25-29.

• 研究论文 • 上一篇    下一篇

丙烯酸丁酯-醋酸乙烯酯共聚物胶乳粒子的结构和性能

林菁, 胡力平, 焦书科   

  1. 北京化工学院应用化学系
  • 收稿日期:1987-08-25 修回日期:1988-03-31 出版日期:1988-10-10 发布日期:1988-10-10

THE MICROSTRUCTURE AND PROPERTIES OF EMULSION COPOLYMER OF BUTYL ACRYLATE WITH VINYL ACETATE

Lin Jing, Hu Liping, Jiao Shuke   

  1. Depatment of Applied Chemistry, Beijing Institute of Chemical Technology
  • Received:1987-08-25 Revised:1988-03-31 Published:1988-10-10 Online:1988-10-10

PDF

493

被引次数

23

摘要： 电镜观察表明,丙烯酸丁酯-醋酸乙烯酯共聚物胶乳粒子均为核-壳结构,若配料比不同,含量大者为核,而加料方式不同,则先加者先聚合成核.微观结构不同,可明显地影响胶膜的力学性能、Tg和耐水性.根据胶乳粒子微观结构的观察结果,认为当醋酸乙烯酯>50mol%时,共聚的引发和成核是在水相中进行的.

关键词: 丙烯酸丁酯-醋酸乙烯酯共聚物, 乳液聚合, 核壳结构, 胶膜力学性能

Abstract: Themicrophotographs showed that the emulsion of the acrylate-vinyl acetate copolymer possessedcore-shell structure.When different feed ratio was used the monomer predominantin feeding comprised core,by using various means of feeding the monomer first added polymerized and formed core first.The microstructure showed obvious effect on the mechanical properties,Tg and water-resistance of the latex film cast from the emulsion.Based on the study on the microstructure of emulsion particle it is considered that when the content of vinyl acetate was more than 50mol% in feeding the initiation and nuclei formation of the copolymerization proceeded in water phase.

Key words: Acrylate-vinyl acetate copolymer, Emulsion polymerization, Core-shell structure, Mechanical property of latex film

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