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首页> 外文期刊>Journal of Applied Polymer Science >On-step one-pot photoinitiation of free radical and free radical promoted cationic polymerizations
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On-step one-pot photoinitiation of free radical and free radical promoted cationic polymerizations

机译：一步式自由基光引发自由基和自由基促进的阳离子聚合

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摘要

We describe here a novel approach to photoinitiate free radical and cationic polymerizations concurrently, involving the use of benzoin in conjunction with an onium salt such as diphenyl iodonium or N-alkoxy pyridinium salt. On photolysis, benzoyl radicals formed from the decomposition of benzoin initiate free radical polymerization of methyl methacrylate. The hydroxy benzyl radicals formed concomitantly are readily oxidized to the corresponding cation by the onium salt to initiate cationic polymerization of cyclohexene oxide in the same system. Evidence for two independent polymerizations was obtained from studies involving gel permeation chromatography, extractions, and infrared and proton nuclear magnetic resonance analysis of the polymers. The effect of the type of the onium salt on each polymerization was also investigated. (C) 2002 Wiley Periodicals, Inc. [References: 21]
机译：我们在这里描述了一种同时光引发自由基和阳离子聚合的新方法，涉及将安息香与鎓盐（如二苯基碘鎓或N-烷氧基吡啶鎓盐）结合使用。光解时，由安息香分解产生的苯甲酰基自由基引发甲基丙烯酸甲酯的自由基聚合。伴随形成的羟基苄基自由基容易被鎓盐氧化成相应的阳离子，从而在同一系统中引发环己烯氧化物的阳离子聚合。从涉及凝胶渗透色谱，萃取以及聚合物的红外和质子核磁共振分析的研究中获得了两次独立聚合的证据。还研究了鎓盐的类型对每种聚合的影响。 （C）2002 Wiley Periodicals，Inc. [参考：21]

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