Premium
Thermal and photo‐oxidation of polysulfone
Author(s) -
Gesner B. D.,
Kelleher P. G.
Publication year - 1968
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.1968.070120518
Subject(s) - polysulfone , photochemistry , polymer , carbon monoxide , thermal oxidation , chemistry , intrinsic viscosity , absorption (acoustics) , bond cleavage , elongation , infrared , ultraviolet , polymer chemistry , materials science , organic chemistry , ultimate tensile strength , catalysis , oxide , composite material , physics , optics , optoelectronics
Prolonged heating at temperatures below 140°C. causes only slight changes in the properties of polysulfone. Exposure to ultraviolet light, however, results in substantial changes as evidenced by broad absorption in both the hydroxyl and carbonyl regions of the infrared spectrum, evolution of carbon monoxide and dioxide, decrease in polymer elongation and intrinsic viscosity, and pronounced yellowing. A free‐radical mechanism is proposed in which chain scission occurs with the formation of low molecular weight, oxidized fragments as the predominant oxidation products.