高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (3): 466.

• 论文 • 上一篇    下一篇

乙烯系自由基聚合阻聚效应(XⅧ)──哌啶氮氧自由基氨基硫脲化合物与通用阻聚剂混合对MMA阻聚效应研究

张自义, 魏秀英, 王铁军   

  1. 兰州大学化学系, 兰州, 730000
  • 收稿日期:1993-04-08 修回日期:1993-07-19 出版日期:1994-03-24 发布日期:1994-03-24
  • 通讯作者: 张自义,男,59岁,教授.
  • 作者简介:张自义,男,59岁,教授.
  • 基金资助:

    国家自然科学基金

Inhibiting Effect of Radical Polymerization of Vinyl Monomers(XⅧ)──Studies on Inhibiting Effect of ATSCPOs in Corporated with Common Inhibitors on MMA

ZHANG Zi-Yi, WEI Xiu-Ying, WANG Tie-Jun   

  1. Department of Chemistry, Lanzhou University, Lanzhou, 730000
  • Received:1993-04-08 Revised:1993-07-19 Online:1994-03-24 Published:1994-03-24

PDF (PC)

被引次数

3

摘要： 本文研究了3种1-(芳酰基)-4[4'-(2,2,6,6-四甲基哌啶)-1-氧自由基]氨基硫脲化合物(ATSCPO)分别同通用阻聚剂(CIH),如对苯二酚(HQ)、苯醌(BQ)、吩噻嗪(PT)及二乙羟胺(DEHA)组成的混合阻聚剂对AIBN引发的MMA自由基聚合的影响。研究结果表明:当[ATSCPO]/CIH=5:1时,除ATSCPO-BQ外,其余阻聚效果均较ATSCPO和CIH单独用作阻聚剂时高,如聚合反应诱导期延长、聚合速率下降、聚合物粘均分子量变小等,表明ATSCPO和CHI间有协同效应。通过对阻聚因素的考察,得出阻聚剂的活性次序为ATSCPOHQ>ATSCPO-PT>ATSCPO-DEHA≈ATSCPO-BQ.

关键词: 阻聚剂, 自由基聚合反应, 1-(芳酰基)-4[4'-(2, 2, 6, 6-四甲基哌啶-1-氧自由基)]氨基硫脲, 甲基丙烯酸甲酯

Abstract: The inhibiting effect of 1-arylformyl-4[4'-(2,2,6,6-tetramethyl piperidine)-1-oxy thiosemicarbazide(ATSCPOs)incorporated with common inhibitor(CIH), such as hydroquinone(HQ),1,4-benzoquione(BQ),N,N'-bisethylhydroxylamino(DEHA)and phenothiazone(PT) on radical polymerization of methyl methacrylate under the initiation of AIBNhas been studied by dilatometric method.The results showed that when ATCPO/CIHequalized to 5: 1,inhibiting effect of these prescription became more prominent than ATSCPOs or CIHused as inhibitor alone, but ATSCPOs-BQ composition, For example, test indicated that the inductive period of polymerization(ti)was extended, the Rp after ti, were decreased and the Mw of polymethylmethacrylate has been turned into smallish.The appearance revealed that there is a synergistic action between ATSCPOs and CHI.On the basis of retardation coefficient(K) and inhibiting factor(F), relative inhibiting reactivities of several ATSCPOs were determined as in the following order: ATSCPOs-HQ>ATSCPOs-PT>ATSCPOs-DAHA≈ATSCPOs-BQ

Key words: Inhibitor, Radical polymerization, 1-Arylformyl-4-(4'-(2,2,6,6-tetramethyl piperidine)-1-oxy]thiosemicarbazides, Methyl methacrylate

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