Profluorescent nitroxides: Thermo-oxidation sensors for stabilised polypropylene

Colwell, John M., Walker, James R., Blinco, James P., Micallef, Aaron S., George, Graeme A. and Bottle, Steven E. (2010) Profluorescent nitroxides: Thermo-oxidation sensors for stabilised polypropylene. Polymer Degradation and Stability, 95 10: 2101-2109. doi:10.1016/j.polymdegradstab.2010.06.019

Author Colwell, John M.
Walker, James R.
Blinco, James P.
Micallef, Aaron S.
George, Graeme A.
Bottle, Steven E.
Title Profluorescent nitroxides: Thermo-oxidation sensors for stabilised polypropylene
Journal name Polymer Degradation and Stability   Check publisher's open access policy
ISSN 0141-3910
Publication date 2010-10
Sub-type Article (original research)
DOI 10.1016/j.polymdegradstab.2010.06.019
Volume 95
Issue 10
Start page 2101
End page 2109
Total pages 9
Place of publication Barking, Essex, U.K.
Publisher Elsevier
Collection year 2011
Language eng
Formatted abstract
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 phosphate 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 °C in oxygen and sensors of thermo-oxidation during its early stages, in the so-called "induction period".
© 2010 Published by Elsevier Ltd.
Keyword Profluorescent nitroxide
Thermal oxidation
Hindered phenol stabiliser
Hindered phosphite stabiliser
Isoindoline Nitroxides
Antioxidant activity
Solid Polypropylene
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2011 Collection
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 5 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 5 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 17 Oct 2010, 00:03:20 EST