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首页> 外文期刊>Journal of Applied Polymer Science >Radical styrene polymerization in the presence of trace levels of sulfonic acids
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Radical styrene polymerization in the presence of trace levels of sulfonic acids

机译：痕量磺酸存在下的自由基苯乙烯聚合

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The bulk polymerization of styrene in the presence of the vinyl functional sulfonic acid 2-sulfoethylmethacrylate (SEM) was found to have utility for making polystyrenes with narrow polydispersity, bimodal polydispersity, and ultrahigh molecular weight at fast polymerization rates. Narrow polydispersity polymers were made by the addition of SEM to nitroxide-mediated polymerizations. Bimodal polydispersity polymers were made by the ultrahigh molecular weight component being made in the presence of SEM in the absence of an initiator and the low molecular weight component being made in the presence of an initiator and/or chain-transfer agent. Ultrahigh molecular weight monomodal polystyrenes were prepared at much faster polymerization rates than possible via spontaneous polymerization in the absence of SEM. SEM was found to be more effective, by an order of magnitude, than camphor sulfonic acid on a weight basis and, because it is copolymerized into the polymer chain, should not lead to corrosion problems during fabrication of the polymer. (C) 2002 Wiley Periodicals, Inc. [References: 6]
机译：发现在乙烯基官能磺酸2-甲基丙烯酸磺基乙基酯（SEM）的存在下，苯乙烯的本体聚合可用于以快速聚合速率制备具有窄多分散性，双峰多分散性和超高分子量的聚苯乙烯。窄多分散性聚合物是通过将SEM添加到一氧化氮介导的聚合反应中制得的。双峰多分散性聚合物是通过在没有引发剂的情况下在SEM存在下制备超高分子量组分和在存在引发剂和/或链转移剂的情况下制备低分子量组分来制备的。在没有SEM的情况下，以比通过自发聚合可能的聚合速率快得多的聚合速率制备了超高分子量单峰聚苯乙烯。发现SEM按重量计比樟脑磺酸有效一个数量级，并且由于其被共聚到聚合物链中，因此不应在聚合物制造期间导致腐蚀问题。 （C）2002 Wiley Periodicals，Inc. [参考：6]

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