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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis of poly(vinyl acetate) by degenerative transfer polymerization in the presence of iodine
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Synthesis of poly(vinyl acetate) by degenerative transfer polymerization in the presence of iodine

机译：在碘存在下通过变性转移聚合合成聚乙酸乙烯酯

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摘要

Polymerization of vinyl acetate initiated by 2,2'-azobis(isobutyronitrile) at 75°C in the presence of iodine has been investigated. The process efficiently controls the number-average molecular weight and low polydispersities (M _w/M _n % 1.52). Poly(vinyl acetate) with predetermined molecular weight and relatively low polydispersity was successfully synthesized. The polymerization was followed by online;bsupesup&H-NMR spectra to investigate the evolution of several compounds in the reaction medium, especially the adduct of α-iodoisobutyronitrile ((CH;bsubesubbsubesubumlI) between primary radicals and iodine. The structure of the end groups of poly(vinyl acetate) also was investigated using ~1H-NMR spectra.
机译：已经研究了在碘存在下，在75℃下由2,2'-偶氮二（异丁腈）引发的乙酸乙烯酯的聚合反应。该方法有效地控制了数均分子量和低多分散性（M _w / M _n％1.52）。成功合成了具有预定分子量和较低分散度的聚醋酸乙烯酯。聚合反应后，在线bsupesup和1 H-NMR谱图研究反应介质中几种化合物的演变，特别是α-碘异丁腈（（CH; bsubesubbsubesubumlI）在伯基和碘之间的加合物。聚端基的结构还使用〜1H-NMR光谱研究了乙酸乙烯酯（乙酸乙烯酯）。

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