Profluorescent nitroxides: Thermo-oxidation sensors for stabilised polypropylene

被引：16

作者：

Colwell, John M. ^{[1
,2
]}

Walker, James R. ^{[1
]}

Blinco, James P. ^{[1
]}

Micallef, Aaron S. ^{[1
]}

George, Graeme A. ^{[1
,2
]}

Bottle, Steven E. ^{[1
]}

机构：

[1] Queensland Univ Technol, ARC Ctr Excellence Free Radical Chem & Biotechnol, Brisbane, Qld 4001, Australia

[2] Univ Queensland, Sch Mech & Min Engn, Def Mat Technol Ctr, St Lucia, Qld 4072, Australia

来源：

POLYMER DEGRADATION AND STABILITY | 2010年 / 95卷 / 10期

基金：

澳大利亚研究理事会;

关键词：

Profluorescent nitroxide; Polypropylene; Thermal oxidation; Stabilisation; Hindered phenol stabiliser; Hindered phosphite stabiliser; ISOINDOLINE NITROXIDES; ANTIOXIDANT ACTIVITY; SOLID POLYPROPYLENE; OXIDATION; POLYMERS; RADICALS; CHEMILUMINESCENCE; AUTOXIDATION; DEGRADATION; PHENOLS;

D O I：

10.1016/j.polymdegradstab.2010.06.019

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The profluorescent nitroxide, 1,1,3,3-tetramethyldibenzo[e,g]isoindolin-2-yloxyl (TMDBIO) was investigated as a probe for the radical-mediated degradation of stabilised polypropylene. TMDBIO has been previously shown to be a sensitive probe for free-radical degradation during the thermo-oxidation of unstabilised polypropylene. Here we report on the effect that adding hindered phenol or phosphite stabilisers to polypropylene has on the free-radical sensing ability of TMDBIO during thermo-oxidation. In addition, novel dual-functional, hindered phenol containing profluorescent nitroxides, 5-[2-(4-hydroxy-3,5-di-tert-butylphenyl)ethenyl]-1,1,3,3-tetramethylisoindolin-2-yloxyl (HSTMIO) and its derivatives were investigated as probes for the radical-mediated degradation of polypropylene. These dual-functional probes were shown to be efficient stabilisers for polypropylene during thermo-oxidation at 150 degrees C in oxygen and sensors of thermo-oxidation during its early stages, in the so-called "induction period". (C) 2010 Published by Elsevier Ltd.

引用

页码：2101 / 2109

页数：9

共 29 条

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