INHIBITING EFFECT ON THE RADICAL POLYMERIZATION OF VINYL MONOMERS -XIX. STUDIES ON THE BEHAVIOUR OF SOME HINDERED HYDROXYLAMINES AND THEIR NITROXYL STABLE RADICAL IN FREE RADICAL COPOLYMERIZATION OF STYRENE WITH ACRYLONITRILE

LI Zhao-long; Zhang Zi-yi; LIU Xian-bin

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INHIBITING EFFECT ON THE RADICAL POLYMERIZATION OF VINYL MONOMERS -XIX. STUDIES ON THE BEHAVIOUR OF SOME HINDERED HYDROXYLAMINES AND THEIR NITROXYL STABLE RADICAL IN FREE RADICAL COPOLYMERIZATION OF STYRENE WITH ACRYLONITRILE

Research Article | 更新时间：2021-03-19

- INHIBITING EFFECT ON THE RADICAL POLYMERIZATION OF VINYL MONOMERS -XIX. STUDIES ON THE BEHAVIOUR OF SOME HINDERED HYDROXYLAMINES AND THEIR NITROXYL STABLE RADICAL IN FREE RADICAL COPOLYMERIZATION OF STYRENE WITH ACRYLONITRILE
- Acta Polymerica Sinica Issue 2, Pages: 219-225(1994)
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- Published：20 April 1994，
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LI Zhao-long, Zhang Zi-yi, LIU Xian-bin. INHIBITING EFFECT ON THE RADICAL POLYMERIZATION OF VINYL MONOMERS -XIX. STUDIES ON THE BEHAVIOUR OF SOME HINDERED HYDROXYLAMINES AND THEIR NITROXYL STABLE RADICAL IN FREE RADICAL COPOLYMERIZATION OF STYRENE WITH ACRYLONITRILE. [J]. Acta Polymerica Sinica (2):219-225(1994)
DOI：

LI Zhao-long, Zhang Zi-yi, LIU Xian-bin. INHIBITING EFFECT ON THE RADICAL POLYMERIZATION OF VINYL MONOMERS -XIX. STUDIES ON THE BEHAVIOUR OF SOME HINDERED HYDROXYLAMINES AND THEIR NITROXYL STABLE RADICAL IN FREE RADICAL COPOLYMERIZATION OF STYRENE WITH ACRYLONITRILE. [J]. Acta Polymerica Sinica (2):219-225(1994) DOI：

摘要

研究了二叔丁基羟胺（ＤＴＢＨＡ），二叔丁基氮氧自由基（ＤＴＢＮＯ·），２，２，６，６－四甲基－４－羟基哌啶羟胺（ＴＭＨＰＨＡ）和２，２，６，６－四甲基－４－羟基哌啶－１－氧自由基（ＴＭＨＰＯ·）对过氧化苯甲酰（ＢＰＯ）６０℃引发的苯乙烯（Ｍ１）－丙烯腈（Ｍ２）共聚合的阻聚行为．结果表明，这些阻聚剂对Ｓｔ－ＡＮ共聚均表现良好的阻聚行为，其中氮氧自由基优于相应羟胺．同时观察到Ｓｔ—ＡＮ竞聚率的改变，羟胺使ｒ１有所降低，ｒ２略有增大．但相应的氮氧自由基是相反结果．阻聚剂为２００ｐｐｍ时，共聚物中的恒比共聚点由对照实验的０．６１９变化为０．５３３，０．６４５，０．５８９和０．６９８相对于ＤＴＢＨＡ，ＤＴＢＮＯ·，ＴＭＨＰＨＡ和ＴＭＨＰＯ·．

Abstract

The behaviour of N

N'- ditertbutylhydroxylamine (DTBHA ). N

N '- ditertbutyl nitroxyl radical (DTBNO' )

6- tetramethyl-4 - hydroxyl piperdinehy droxylamine (TMHPHA) and its nitroxyl radical (TMHPO' )

as inhibitors of the BPO- initiated copolymerization of styrene (M 1 ) with acrylonitrile (M2 )

at 60℃

has been studied. The result showed that the inhibition efficiency of nitroxyl radical is better than that of their hydroxylamines and their relative inhibiting order are TMHPO > DTBNO >TMHPHA>DTBHA. It was also found that the reactivity ratios of St-AN are different in various inhibitors. When the amount of these inhibitors is about 200-500ppn r1 decreases and r2 increases in the hydroxylamine condition but the opposite result is shown in nitroxyl radicals and the azeotropic point of copolymerization of St -AN cahanges from 0.619 to 0.698

0.645

0.589 and 0.533 for TMHPO.DTBNO.TMHPHA and DTBHA respectively.

关键词

共聚合阻聚反应取代羟胺稳定自由基苯乙烯丙烯腈

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