文献类型：期刊文献

中文题名：偏氟乙烯/六氟丙烯乳液共聚反应动力学

英文题名：Emulsion Copolymerization Kinetics of VDF/HFP

作者：余永重[1];冯东东[2];谢众[1];庄启昕[1];韩哲文[1]

机构：[1]华东理工大学材料科学与工程学院,超细材料制备与应用教育部重点实验室,上海200237;[2]上海三爱富新材料股份有限公司,上海200241

年份：2008

卷号：21

期号：3

起止页码：338

中文期刊名：功能高分子学报

外文期刊名：Journal of Functional Polymers

收录：CSTPCD;;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：乳液共聚;偏氟乙烯;六氟丙烯;动力学;竞聚率

外文关键词：emulsion copolymerization; vinylidene fluoride; hexafluoropropene; kinetics; reactivity ration

摘要：对气相含氟单体偏氟乙烯(VDF)/六氟丙烯(HFP)的乳液共聚反应动力学机理进行了研究。结果表明:在80℃下,上述两种单体共聚反应速率r对乳化剂浓度(S)、引发剂浓度(I)和反应总压力(p)分别呈0.05级、0.31级和1.59级反应,由此推导得乳液共聚的反应速率表达式为:r=1.11×10-4S0.05I0.31p1.59,其中速率常数k=1.11×10-4g-0.37L0.37(MPa)-0.59min-1。由上述动力学方程计算得到的乳液共聚反应速率与实验结果一致。同时对两种单体的竞聚率做了初步讨论。
The emulsion copolymerization kinetic of vinylidene fluoride （VDF）/ hexafluoropropene （HFP） was studied and the copolymerization rate was measured according to the pressure of reaction system. Results show that the emulsion copolymerization rate is proportional to the 0.05 power of the concentration of emulsifier（S）. It is also found that emulsion copolymerization rate of VDF/HFP is proportional to the 0. 31 and 1.59 power to the initial initiator concentration （I） and the total gaseous pressure of the reaction system（p） respectively. At last, the emulsion copolymerization rate of VDF/HFP at 80 ℃ is mainly determined with initial S, I and p, and can be expressed as r： 1.11 ×10^- 4S^0.05 I^0. 31p^1. 59 when stirring rate is 850 r/min. Meanwhile, the reactivity ration of two monomers is disscussed.