乙烯系单体自由基聚合的阻聚效应(ⅩⅪ)——羟胺类化合物对苯乙烯—甲基丙烯酸甲酯共聚合的影响  

Inhibition Effect on the Radical Polymerization of Vinyl Monomers(ⅩⅩⅠ) ——Studies on the behavior of some substituted hydroxylamine in the copolymerization of styrene with methyl methacrylate

作　　者：李兆陇[1] 张自义[1] 贾志胜[1] 胡俊 

机构地区：[1]兰州大学化学系

出　　处：《兰州大学学报（自然科学版）》1998年第1期69-75,共7页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金

摘　　要：研究了二乙基羟胺（ＤＥＨＡ）、二异丙基羟胺（ＤＩＰＨＡ）和吗啉羟胺（ＭＰＨＡ）对偶氮二异丁腈（ＡＩＢＮ）引发的苯乙烯（Ｍ１）－甲基丙烯酸甲酯（Ｍ２）在６０℃共聚合的行为．结果表明，３种羟胺对Ｓｔ－ＭＭＡ共聚合表现出不同的阻聚功效，它们的阻聚活性次序为ＤＥＨＡ＞ＤＩＰＨＡ＞ＭＰＨＡ．同时观察到Ｓｔ－ＭＭＡ共聚合竞聚率发生变化，随着所用羟胺的浓度加大，Ｓｔ－ＭＭＡ交替共聚合倾向增大．此外还讨论了聚合温度对诱导期、共聚合速率和共聚物组成的影响．The inhibition effect of N,N diethyl hydroxylamineDEHA), N,N diisopropyl hydroxylamine(DIPHA) and 4 hydroxylmorpholine(MPHA) on the free radical copolymerization of styrene(M 1) methyl methacrylate(M 2), initiated with AIBN at 60℃, has been investigated by dilatometric method. The results showed that the three kinds of hydroxylamine were proved to be very efficient inhibitors on the copolymerization of St MMA, and their relative inhibiting order was DEHA>DIPHA>MPHA. It was also found that the reactivity ratio of St. and MMA decreases in the presence of inhibitors, showing a obviously increasing tendency toward alternating copolymerization. The induction period, the rate of propagating and the composition of copolymerization in the DEHA at differet temperature were also discussed.

关 键 词：阻聚效应 苯乙烯 自由基聚合 乙烯 共聚 

分 类 号：O632.12[理学—高分子化学] O632.13[理学—化学]