高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (3): 481.

• 研究论文 • 上一篇    下一篇

在无机SiO2纳米粒子存在下的苯丙乳液共聚合

张径, 杨玉昆   

  1. 中国科学院化学研究所, 北京 100080
  • 收稿日期:2000-04-24 出版日期:2002-03-24 发布日期:2002-03-24
  • 通讯作者: 杨玉昆(1941年出生),男,研究员,主要从事胶粘剂及复合材料研究.E-mail:yangykun@ht.rol.cn.net E-mail:yangykun@ht.rol.cn.net

Emulsion Polymerization of Styrene and Butyl Acrylate in the Presence of Inorganic SiO2 Nanoparticles

ZHANG Jing, YANG Yu-Kun    

  1. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2000-04-24 Online:2002-03-24 Published:2002-03-24

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摘要： 研究了在无机SiO2纳米粒子存在下的苯丙乳液共聚合.选择了能使苯丙乳液稳定存在的乳化剂体系,研究了温度和SiO2的加入对聚合过程转化率的影响,结果表明,SiO2的加入对聚合过程有阻聚作用,使单体的转化率降低.SEM照片证明SiO2粒子已经进入苯丙乳液粒子中,而且SiO2的加入对乳液制成的膜断面形态有一定影响.实验发现在无机SiO2纳米粒子存在下,苯丙乳液共聚合时有较多残渣出现,对此通过改进乳液聚合进行了有效地改善.同时对制成的复合材料进行了力学性能和热学性能的测定.

关键词: 苯丙乳液, SiO2纳米粒子, 无机-聚合物纳米复合材料

Abstract: Emulsion co-polymerization of St/BAin the presence of inorganic SiO2 nanoparticles was studied. Firstly, the most effective emulsifiers for this emulsion copolymerization were chosen. Then, the influence of temperature and SiO2 content on conversion were studied and the results convicted that SiO2 could reduce the conversion of monomer. By SEMit was proved that SiO2 had been encapsulated into emulsoid of St/BAand SiO2 could influence the fracture structure of emulsion polymer. Residues appeared during the polymerization, this phenomenon was researched by elemental analysis. The mechanical and thermal properties of composites were measured to find that SiO2 content had great influence on these properties. In the end an improved emulsion polymerization process by beforehand emulsifying SiO2 nanoparticles was presented and a better result was obtained.

Key words: Emulsion co-polymerization of St/BA, SiO2 nanoparticle, Inorganic-polymer nanocomposites

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