高等学校化学学报

高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (3): 428.

• 研究论文 • 上一篇    下一篇

KPS-CuSo4-Na2SO3参与的无皂液聚合

戴李宗, 邹友思, 陈世群, 潘容华   

  1. 厦门大学化学系, 厦门 361005
  • 收稿日期:1992-03-31 修回日期:1992-08-01 出版日期:1993-03-24 发布日期:1993-03-24
  • 通讯作者: 戴李宗

Emulsifier-free Emulsion Polymerization Participated by KPS-CuSO4-Na2SO3

DAI Li-Zong, ZOU You-Si, CHEN Shi-Qun, PAN Rong-Hua   

  1. Department of Chemistry, Xiamen University, Xiamen, 361005
  • Received:1992-03-31 Revised:1992-08-01 Online:1993-03-24 Published:1993-03-24

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摘要： 研究了MMA-St在氧化还原引发剂KPS-CuSO4-Na2SO3存在下的快速无皂乳液聚合.当[MMA]=0.51mol/L、[St]=0.49mol/L、70℃对,在[KPS]=2.77×10-3mol/L、[CuSO4]=1.50×10-5mol/L、[Na2SO3]=2.77×10-3mol/L条件下反应100min,转化率大于90％;讨论了胶乳的分子量及其分布;求出了聚合反应活化能Ea=81.6kJ/mol和聚合反应速率常数kp=321.9L/mol·s.

关键词: 无皂乳液聚合, 甲基丙烯酸甲酯, 苯乙烯, 氧化还原引发剂

Abstract: Rapid emulsifier-free emulsion polymerization of methyl methacrylate-styrene was discussed in the presence of redox initiator KPS-CuSO<-Na2SO3. When [MMA]=0.51 mol/L, [St] = 0.49 mol/L, temp.70℃, more suitable quantity of redox initiator was obtained: [KPS]=2.77× 10-3 mol/L, [CuSO4]=l.50×10-5 mol/L, [Na2SO3]=2.77×10-3 mol/L.Reaction time was 100 min.Under the conditions as indicates above, the conversion of monomers surpassed 90%.Restrictive aggregation of emulsion particles existed in the process of reaction.Molecular weight and its distribution of emulsion which were produced by three system of emulsion polymerization are discussed.According to Arrheniu's figuration, the activation energy of polymerization (Ea = 81.6 kJ/mol) was counted.The reaction rate constant kp=321.9 L/mol·s) at 70℃ was calculated.

Key words: Emulsifier-free emulsion polymerization, Methyl methacryiate, Styrene, Redox initiator

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