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首页> 外文期刊>Journal of Applied Polymer Science >Role of fluorocarbon surfactant in the preparation of polytetrafluoroethylene-modified polyacrylate emulsion
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Role of fluorocarbon surfactant in the preparation of polytetrafluoroethylene-modified polyacrylate emulsion

机译：氟碳表面活性剂在聚四氟乙烯改性聚丙烯酸酯乳液制备中的作用

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摘要

Role of fluorocarbon surfactant in the preparation of polytetrafluoroethylene-modified polyacrylate emulsion is investigated. The fluorocarbon surfactant has an efficient preemulsification to polytetrafluoroethylene (PTFE) powder. It enables PTFE powder to be introduced into the copolymer of n-butyl acrylate, n-methyl methacrylate, n-styrene, and a-methacrylic acid. Thereby, stable PTFE-modified polyacrylate emulsion can be formed. The effects of fluorocarbon surfactant on the surface tension, particle size and particle size distribution of the emulsion, as well as the relation between fluorocarbon surfactant and the amount of PTFE powder are fully investigated. The particle size and the surface tension of emulsion strongly depend on the fluorocarbon surfactant concentration in the reaction system. The particle size distribution becomes narrower and the stability of the emulsion is improved with the increasing of the fluorocarbon surfactant concentration. According to the experiments, a possible mechanism of fluorocarbon surfactant in polymerization is proposed. (c) 2007 Wiley Periodicals, Inc.
机译：研究了碳氟化合物表面活性剂在聚四氟乙烯改性聚丙烯酸酯乳液制备中的作用。氟碳表面活性剂对聚四氟乙烯（PTFE）粉末具有有效的预乳化作用。它可以将PTFE粉末引入丙烯酸正丁酯，甲基丙烯酸正丁酯，正苯乙烯和α-甲基丙烯酸的共聚物中。由此，可以形成稳定的PTFE改性聚丙烯酸酯乳液。充分研究了氟碳表面活性剂对乳液的表面张力，粒径和粒径分布的影响，以及氟碳表面活性剂与PTFE粉末含量之间的关系。乳液的粒径和表面张力在很大程度上取决于反应体系中碳氟化合物表面活性剂的浓度。随着氟碳表面活性剂浓度的增加，粒度分布变窄并且乳液的稳定性得到改善。根据实验，提出了氟碳表面活性剂聚合的可能机理。 （c）2007年Wiley Periodicals，Inc.

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