Premium
Mechanisms of antioxidant action: the antioxidant activity of nitrones in polypropylene
Author(s) -
Chakraborty Khirud B.,
Scott Gerald,
Yaghmour Hassan
Publication year - 1985
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1985.070300811
Subject(s) - antioxidant , polypropylene , nitroxyl , chemistry , radical , catalysis , polymer , organic chemistry , polymer chemistry , stoichiometry , thermal oxidation , oxide
Aldonitrones are effective melt stabilizers for polypropylene, the most effective being benzaldonitrones containing a partially hindered 4‐hydroxy group in the aromatic ring. They form nitroxyl radicals in the polymer during processing, and these and the related hydroxylamines are believed to be involved in a catalytic CBA/CBD antioxidant cycle during mechano‐ and photooxidation. During thermal oxidation (oven aging) they behave as stoichiometric CB‐D antioxidants.