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首页> 外文期刊>Journal of Applied Polymer Science >Ultrasonically irradiated emulsion polymerization of styrene in the presence of a polymeric surfactant
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Ultrasonically irradiated emulsion polymerization of styrene in the presence of a polymeric surfactant

机译：在聚合物表面活性剂的存在下超声辐照苯乙烯的乳液聚合

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摘要

A polymeric surfactant based on carboxymethyl cellulose and alkyl poly(etheroxy) acrylate (CMC-A9) was used in ultrasonically irradiated emulsion polymerization of styrene. Polystyrene nanoparticles (30-60 nm) with high molecular weight were prepared. Compared with the conventional emulsion polymerization, the introduction of CMC-A9 in the polymerization yielded higher monomer conversion in a shorter time and under lower ultrasonic power output. A single latex particle contained only a few polymer chains with average chain numbers of 2-19. The particle size and polymer chain per particle could be controlled by changing the concentration of CMC-A9 and SDS. The effect of CMC-A9 and SDS on ultrasonically irradiated emulsion polymerization kinetics was studied. The results indicated that the ultrasonically irradiated emulsion polymerization had a similar nucleation mechanism to a miniemulsion polymerization system. This is attributed to the high ratio of radicals and a great number of smaller sizes of monomer droplets produced under ultrasonic irradiation. (C) 2004 Wiley Periodicals, Inc.
机译：将基于羧甲基纤维素和丙烯酸烷基聚（醚氧基）丙烯酸酯的聚合物表面活性剂（CMC-A9）用于苯乙烯的超声辐射乳液聚合。制备了具有高分子量的聚苯乙烯纳米颗粒（30-60 nm）。与常规乳液聚合相比，在聚合反应中引入CMC-A9可以在较短的时间内以较低的超声功率输出获得更高的单体转化率。单个乳胶颗粒仅包含几条聚合物链，平均链数为2-19。可以通过改变CMC-A9和SDS的浓度来控制每个粒子的粒径和聚合物链。研究了CMC-A9和SDS对超声辐照乳液聚合动力学的影响。结果表明，超声辐照乳液聚合具有与细乳液聚合体系相似的成核机理。这归因于自由基的高比率和在超声辐射下产生的许多较小尺寸的单体液滴。 （C）2004年Wiley Periodicals，Inc.

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