高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (9): 1312.

• 研究论文 • 上一篇    下一篇

丙烯酸-β-羟丙酯存在下无皂白交联型聚苯乙烯胶乳的合成与表征

戴李宗, 邹友思, 宋爱群, 潘容华   

  1. 厦门大学化学系, 厦门 361005
  • 收稿日期:1992-11-03 修回日期:1993-02-17 出版日期:1993-09-24 发布日期:1993-09-24
  • 通讯作者: 戴李宗.
  • 作者简介:第一作者:33岁, 男, 讲师.

Synthesis and Characterization of Emulsifier-free Self-cross Linked Polystyrene Latex in the Presence of β-Hydroxy Propyl Acrylate

DAI Li-Zong, ZOU You-Si, SONG Ai-Qun, PAN Rong-Hua   

  1. Department of Chemistry, Xiamen University, Xiamen, 361005
  • Received:1992-11-03 Revised:1993-02-17 Online:1993-09-24 Published:1993-09-24

摘要: 研究了丙烯酸-β-羟丙酯存在下高浓度苯乙烯的无皂乳液聚合.[St]、[β-HPA]、[KPS]分别为2.66、0.228和5.8×10-3mol/L,80℃反应5h,单体转化率可达90%;经TEM分析,求出了胶乳粒径D=0.23μm,粒子浓度N=3.13×1013粒/cm3,且胶乳粒径具有单分散性;并讨论了影响乳液稳定性的因素.经IR光谱和溶解性试验证实β-HPA参与了St共聚,推测了自交联机理;求出了聚合反应表观活化能(78.7kJ/mol)和80℃时的聚合反应速率常数(514.3L/mol·s).

关键词: 无皂乳液聚合, 丙烯酸-&beta, -羟丙酯, 苯乙烯, 自交联胶乳, 动力学

Abstract: Emulsifier-free emulsion polymerization of styrene in the presence of β-hydroxy propyl acrylate was studied.Monomer conversion is higher than 90% when [St], [β-HPA], [KPS] is 2.66, 0.228, and 5.8×10-3 mol/Lrespectively under 80℃ for 5 h.The mono-dispersed latex particle diameter and colloidal particle concentration were given as D=0.23 μm, N=3.13× 1013/cm3 by TEManalyse.The factors of influencing latex stability were discussed.The copoly-mer was characterized by IRand dissolution experiment.The self-cross linked mechanism was also discussed.The apparent activation energy of polymerization and polymerization rate constant were obtained to be 78.7 kJ/mol and 514.3 L/mol · s respectively.

Key words: Emulsifier-free emulsion polymerization, β-Hydroxy propyl acrylate, Styrene, Self- cross linked latex, Kinetics

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