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The inhibition of the thermal oxidative degradation of polypropylene by various phenanthrols
Author(s) -
Osawa Zenjiro,
Ota Etsuro,
Naya Motoji,
Ogiwara Yoshitaka
Publication year - 1974
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.1974.070180313
Subject(s) - polypropylene , tacticity , polymerization , methyl methacrylate , oxidative phosphorylation , degradation (telecommunications) , chemistry , thermal oxidation , oxygen , polymer chemistry , phenol , phenanthrene , kinetics , organic chemistry , materials science , polymer , oxide , biochemistry , telecommunications , physics , quantum mechanics , computer science
All isomers of phenanthrol, 1‐, 2‐, 3‐, 4‐, and 9‐phenanthrol, were prepared and the inhibitory effect of these compounds on the thermal oxidative degradation of isotactic polypropylene was examined by conventional oxygen uptake. The phenanthrols were found to be much more effective antioxidants than commercial 2,6‐di‐ tert ‐butyl‐4‐methyl‐phenol (abbreviated as BHT), and phenanthrene itself hardly showed any inhibitive effect. The effect of the phenanthrols was largely dependent on the position of the hydroxy group; the order of the effect was as follows: 1‐ > 4‐ > 2‐ > 3‐ > 9‐phenanthrol > BHT. The phenanthrols were also good inhibitors of the radical polymerization of methyl methacrylate, and a fairly good correlation was observed between oxygen uptake and radical polymerization data.