中华医学超声杂志

应用化学 ›› 1989, Vol. 0 ›› Issue (2): 19-22.

• 研究论文 • 上一篇    下一篇

乙烯系单体自由基聚合的阻聚效应--Ⅷ.1,3,5-三苯甲(月替)对甲基丙烯酸甲酯的自由基阻聚及历程

张自义, 李兆陇, 刘玉庆   

  1. 兰州大学化学系
  • 收稿日期:1988-03-01 修回日期:1988-09-09 出版日期:1989-04-10 发布日期:1989-04-10
  • 基金资助:
    国家自然科学基金

INHIBITING EFFECTS ON THE RADICAL POLYMERIZATION OF VINYL MONOMERS Ⅷ. EFFECT OF 1,3,5-TRIPH ENYLFORMAZANE ON POLYMERIZATION OF METHYL METHACRYLATE

Chang Ziyi, Li Zhaolong, Liu Yuqing   

  1. Department of Chemistry, Lanzhou University
  • Received:1988-03-01 Revised:1988-09-09 Published:1989-04-10 Online:1989-04-10

PDF

597

摘要： 用膨胀计法研究了1,3,5-三苯甲(月替)(TFH)及其与苯醌(BQ)、四氯苯醌(CA)和1,4-萘醌(NQ)的混合物对偶氮二异丁腈引发的甲基丙烯酸甲酯的阻聚效应。结果表明,TFH与BQ或NQ按一定比例混合阻聚效果显著。但TFH与CA混合则阻聚效果反倒比TFH单独用作阻聚时差。文中研究TFH的变色反应以及聚合系统中(TF·)的存在。初步讨论了TFH及TFH-Q混合对MMA的阻聚反应机理。

关键词: 阻聚剂, 聚合反应, 1,3,5-三苯甲(月替), 醌类, 甲基丙烯酸甲酯

Abstract: The inhibiting effect of 1,3,5-triphenylformazane(TFH) on the free radical polymeriza-tion of methyl methacrylate(MMA), initiated by AIBN, has been studied by dilatometricmethod.The results indicated that when TFH was incorporated with another inhibitors suchas benzoquinone(BQ) or 1,4-naphtholquinone(NQ), the induction period of polymerizationof MMA become longer than when TFH, hydroquinone(HQ) and p-tert-butylcatechol(TBC)was used alone. The results pointed out that when the mixture of TFH and chloranil(CA)in whatever proportion used, the induction period was shorter than when TFH used alone.Prec radicals TF· have been observed in the polymerization of MMA with added TFH.

Key words: Inhibitor, Polymerization, 1,3,5-Triphenylformazane, Quinones, Methyl methacrylate

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