高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (9): 1546.

• 论文 • 上一篇    下一篇

过硫酸钾引发苯乙烯微乳液聚合

徐相凌, 张志成, 张曼维, 葛学武, 吴志超   

  1. 中国科学技术大学应用化学系, 合肥 230026
  • 收稿日期:1996-06-24 出版日期:1997-09-24 发布日期:1997-09-24
  • 通讯作者: 徐相凌, 男, 30岁, 硕士, 讲师.
  • 作者简介:徐相凌, 男, 30岁, 硕士, 讲师.

Microemulsion Polymerization of Styrene Initiated with Potassium Persulfate

XU Xiang-Ling, ZHANG Zhi-Cheng, ZHANG Man-Wei, GE Xue-Wu, WU Zhi-Chao   

  1. Department of Applied Chemistry, University of Science and Technology, Hefei 230026
  • Received:1996-06-24 Online:1997-09-24 Published:1997-09-24

摘要: 以具有Y型结构的乳化剂HOA制备苯乙烯微乳液, 能有有效提高体系中单体浓度和单体对乳化剂的比例.用过硫酸钾引发具有苯乙烯含量较高的微乳液聚合, 记录聚合速率随转化率的变化, 观测到了聚合恒速期的存在.恒速期随单体浓度减小, 过硫酸钾浓度增加及乳化剂浓度增加而缩短.还研究了聚合动力学, 探讨了微乳液聚合的机理.

关键词: 微乳液聚合, 成核机理, 恒速期, Y型乳化剂

Abstract: The monomer content and the ratlo of monomer to emulsifier in styrene mi-croemulsion were greatly uplifted when it was stabllized with an emulsifier with Ystructure.The microemulsion was polyrnerized in dilatometer with potassium persulfate as an initiator.The change of polymerization rate with conversion was recorded, and the plateau of polymer-ization rate in microemulsion polymerization of styrene was first observed. The Iength of theplateau was shortened with the increase of KPSconcentration and emulsifier concentration,or with the decrease of monomer concentration. The polymerlzation kinetics and the poly-merization mechanisms were also discussed.

Key words: Microemulsion polyrnerization, Nucleate mechanism, Plateau of polymerization rate, Emulsifier with Y structure

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