INHIBITING EFFECTS OF RADICAL POLYMERIZATION OF VINYL MONOMERS X.Studies on the Inhibition and Its Mechanism of Hydroxylamines Compounds in Free Radical Polymerization of Styrene

Zhang Zi-yi; LI Zhao-long; WANG Xiao-yan; LU Zhi-zhen; WANG Han-qing; FENG Liang-bo

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INHIBITING EFFECTS OF RADICAL POLYMERIZATION OF VINYL MONOMERS X.Studies on the Inhibition and Its Mechanism of Hydroxylamines Compounds in Free Radical Polymerization of Styrene

Research Bulletin | 更新时间：2021-03-19

- INHIBITING EFFECTS OF RADICAL POLYMERIZATION OF VINYL MONOMERS X.Studies on the Inhibition and Its Mechanism of Hydroxylamines Compounds in Free Radical Polymerization of Styrene
- Acta Polymerica Sinica Issue 2, Pages: 233-238(1990)
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- Published：20 April 1990，
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Zhang Zi-yi, LI Zhao-long, WANG Xiao-yan, LU Zhi-zhen, WANG Han-qing, FENG Liang-bo. INHIBITING EFFECTS OF RADICAL POLYMERIZATION OF VINYL MONOMERS X.Studies on the Inhibition and Its Mechanism of Hydroxylamines Compounds in Free Radical Polymerization of Styrene. [J]. Acta Polymerica Sinica (2):233-238(1990)
DOI：

Zhang Zi-yi, LI Zhao-long, WANG Xiao-yan, LU Zhi-zhen, WANG Han-qing, FENG Liang-bo. INHIBITING EFFECTS OF RADICAL POLYMERIZATION OF VINYL MONOMERS X.Studies on the Inhibition and Its Mechanism of Hydroxylamines Compounds in Free Radical Polymerization of Styrene. [J]. Acta Polymerica Sinica (2):233-238(1990) DOI：

摘要

Abstract

The inhibiting effects of N

N'-diethydroxylamine(DEHA)

N'-diisopropylhydroxylamine (DIPHA)

6-tetramethyl-4-hydroxyl-piperidinhydroxylarnine (TMHPHA)

4-hydroxyl-morpholine(MPHA)

N-phenylhydroxylamine(PHA) and N

N'-diphenylhydroxylamine (DPHA)

on the AIBN-initiated

bulk polymerization of styrene(St) have been studied by dilatomatric method. The inductive period of polymerization(ti)

the rate of propagating after the ti(Rp)

the MW of polystyrene (Mn) the retardating coefficient (K) and the inhibi-ting factor (F) have been obtained. The results reveal that R2NOH have been proved to be very efficient inhibitors and their inhibiting efficiency have been found to depend on the rate and stability of the nitroxide radical formed in reaction. Relative inhibiting reactiveties of several R2NOH have been determined as in the following order; DEHA>TMHPHA>DPHA>DIPHA>MPHA. Other stable nitroxides formed in polymerization of St inthe pre-sence of several R2NOH have also been indentified by ESR and mechanism of inhibition and retardation has been discussed.

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自由基聚合阻聚羟胺苯乙烯

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Beijing National Laboratory for Molecular Sciences,Key Laboratory of Polymer Chemistry and Physics of Ministry of Education,College of Chemistry and Molecular Engineering,Peking University

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