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The effect of carbon black on thermal antioxidants for polyethylene
Author(s) -
Hawkins W. L.,
Hansen R. H.,
Matreyek W.,
Winslow F. H.
Publication year - 1959
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.1959.070010107
Subject(s) - carbon black , polyethylene , amine gas treating , carbon fibers , polymer , antioxidant , thermal decomposition , decomposition , adsorption , thermal oxidation , chemistry , materials science , chemical engineering , organic chemistry , polymer chemistry , composite material , natural rubber , composite number , silicon , engineering
About 3% by weight of carbon black adequately protects polyethylene against photo‐oxidation and, under accelerated test conditions, slightly inhibits thermal oxidation. As a rule small amounts of organic antioxidants are also added to the polymer for optimum protection. Now many of the common phenolic and amine additives have been found to function much less effectively in polyethylene containing carbon black than in clear polymer. Loss of effectiveness is attributed to adsorption and/or decomposition of the antioxidant by both basic and acidic carbon black.