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首页> 外文期刊>Journal of Applied Polymer Science >Kinetics of miniemulsion polymerization with nonionic and anionic surfactants
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Kinetics of miniemulsion polymerization with nonionic and anionic surfactants

机译：非离子和阴离子表面活性剂的细乳液聚合动力学

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The kinetics of miniemulsion polymerization of vinyl acetate, in which nonionic surfactant, Brij-35 [polyoxyethylene(23) lauryl ether], and hexadecane were used, was investigated. For comparison, experiments were also carried out using an anionic surfactant (sodium lauryl sulfate). The results show that, for all experiments, both distributions for the particle size of the latices and the molecular weight of polymers were unimodal. The effects of surfactant and initiator levels on the particle number and the polymerization rate were studied. For the system using Brij-35, the power orders for the dependence of particle number on surfactant and initiator concentrations were 1.33 and 0.68, respectively. The polymerization rate was proportional to the 0.38 power of surfactant level and the 0.84 power of initiator concentration. The hydration layer outside the monomer-swollen particles in the system of nonionic surfactant may exert a retardation effect on the entry of oligomeric radicals into the particles. The result of GPC analysis indicates that the surfactant concentration inversely affects the molecular weight. (C) 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 1691-1699, 2001. [References: 17]
机译：研究了乙酸乙烯酯的细乳液聚合动力学，其中使用了非离子表面活性剂Brij-35 [聚氧乙烯（23）月桂基醚]和十六烷。为了比较，还使用阴离子表面活性剂（月桂基硫酸钠）进行了实验。结果表明，在所有实验中，胶乳的粒径分布和聚合物的分子量均为单峰分布。研究了表面活性剂和引发剂用量对颗粒数和聚合速率的影响。对于使用Brij-35的系统，依赖于表面活性剂和引发剂浓度的颗粒数依赖性的功率阶数分别为1.33和0.68。聚合速率与表面活性剂水平的0.38幂和引发剂浓度的0.84幂成比例。非离子表面活性剂体系中单体溶胀颗粒外部的水合层可能对低聚自由基进入颗粒产生阻滞作用。 GPC分析的结果表明表面活性剂浓度反过来影响分子量。 （C）2001 John Wiley＆Sons，Inc. J Appl Polym Sci 81：1691-1699，2001。[参考：17]

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