Inhibiting Effect of Radical Polymerization of Vinyl Monomers(ⅩⅤ)——Studies on the Behaviour of Some Substituted Hydroxyl amines in the Copolymerization of Styrene with Aeryloititrile

Chem. J. Chinese Universities ›› 1992, Vol. 13 ›› Issue (10): 1319.

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Inhibiting Effect of Radical Polymerization of Vinyl Monomers(ⅩⅤ)——Studies on the Behaviour of Some Substituted Hydroxyl amines in the Copolymerization of Styrene with Aeryloititrile

ZHANG Zi-Yi, LI Zhao-Long, YANG Mao-Lin

Department of Chemistry, Lanzhou University, Lanzhou, 730000

Received:1991-10-25 Revised:1991-05-26 Online:1992-10-24 Published:1992-10-24

Abstract

Abstract: The behaviour of N,N'-diethylhydroxylamine (DEHA),N,N'-diisopropyl-hydroxylamine(DIPHA) and 4-hydroxylmorpholine(MPHA) as inhibitors of the copolymerization of styrene(M₁) with acrylonitrile(M₂) initiated by benzoyl peroxide,at 60℃ was investigated.The result showed that the three kinds of hydroxyiamines were proved to be the very efficient inhibitors and their relative inhibiting order was DEHA>MPHA>DIPHA.It was also found that the reactivity radios of St and ANare different for various inhibitors.When the a-mount of hydroxyiamines is about 500 ppm,r₁ decreases and r₂ increases and the azeotropic point of copolymerization of St-AN decreases from 0.62 to 0.55,0,54 and 0,57 for DEHA,DIPHA and MPHA respectively,showing an increasing tendency toward alternating copolymerization.

Key words: Copolymerization, Inhibition, Substituted Ilydroxylamines, Styrene, Acrylonitriie

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ZHANG Zi-Yi, LI Zhao-Long, YANG Mao-Lin . Inhibiting Effect of Radical Polymerization of Vinyl Monomers(ⅩⅤ)——Studies on the Behaviour of Some Substituted Hydroxyl amines in the Copolymerization of Styrene with Aeryloititrile[J]. Chem. J. Chinese Universities, 1992, 13(10): 1319.

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Inhibiting Effect of Radical Polymerization of Vinyl Monomers(ⅩⅤ)——Studies on the Behaviour of Some Substituted Hydroxyl amines in the Copolymerization of Styrene with Aeryloititrile

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