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Iodoform-mediated free radical emulsion polymerization of chloroprene

机译:碘仿介导的氯丁二烯自由基乳液聚合

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摘要

The free radical emulsion polymerization of chloroprene (CP) is carried out at 9°C using different amounts of iodoform as the chain transfer agent. The molecular weight of polychloroprene (PCP) can be regulated effectively by CHI_3. PCP suitable for use as an adhesive is obtained with 0.22-0.28 wt % CHI_3 and reaches even higher monomer conversion than when mercaptan is used as the chain transfer agent. The emulsion polymerization of CP with high amounts of CHI_3 (1.0-3.0 wt %) proceeds in a living polymerization manner. The molecular weight increases in proportion to the monomer conversion in the range of the whole polymerization process even up to very high monomer conversion.
机译:氯丁二烯(CP)的自由基乳液聚合反应是在9℃下使用不同量的碘仿作为链转移剂进行的。 CHI_3可以有效调节聚氯丁二烯(PCP)的分子量。与0.2-0.28重量%的CHI_3相比,获得了适合用作粘合剂的PCP,并且与使用硫醇作为链转移剂时相比,甚至达到了更高的单体转化率。具有大量CHI_3(1.0-3.0wt%)的CP的乳液聚合以活性聚合方式进行。在整个聚合过程的范围内,分子量甚至与单体转化率成比例地增加,甚至达到非常高的单体转化率。

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