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Investigations of stabilizing additives. IV. PEPQ as a primary radical scavenger
Author(s) -
Williams J. L.,
Williams E. E.,
Dunn T. S.
Publication year - 1982
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.1982.070270314
Subject(s) - scavenger , antioxidant , stabilizer (aeronautics) , free radical scavenger , primary (astronomy) , chemistry , polypropylene , organic chemistry , chemical engineering , materials science , mechanical engineering , physics , astronomy , engineering
Studies of PEPQ in a model antioxidant activity system have demonstrated that this material behaves not only as a hydroperoxide decomposer but as a primary radical scavenger. The temperature dependence of the antioxidant activity also indicates the PEPQ is more effective at higher temperatures than at ambient conditions. The relationship between the model antioxidant activity system and melt stability measurements in polypropylene is in good agreement and implies that PEPQ is an effective melt stabilizer even in the absence of conventional phenolic stabilizers such as BHT.