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Stabilization of gamma‐irradiated poly(vinyl chloride) by epoxy compounds. II. Production of hydroperoxides in gamma‐irradiated PVC–stabilizer mixtures
Author(s) -
Lerke I.,
Szymański W.
Publication year - 1983
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.1983.070280207
Subject(s) - epoxy , diglycidyl ether , radiolysis , epoxide , benzene , chemistry , stabilizer (aeronautics) , polymer chemistry , nuclear chemistry , styrene , propane , vinyl chloride , castor oil , epoxidized soybean oil , polymer , materials science , bisphenol a , organic chemistry , radical , catalysis , mechanical engineering , raw material , engineering , copolymer
The concentration of hydroperoxides, produced in the process of radiolysis, was studied in γ‐irradiated PVC samples with 4% admixture of four epoxy stabilizers: diglycidyl ether of 2,2‐bis(4‐hydroxy‐3‐methyl phenyl)propane (I), styrene oxide (1,2‐epoxy ethyl benzene) (IV), epoxidized ricinus oil (VI), and epoxidized soybean oil (Drapex 6.8.) (VII). The results indicate that the process of radiation oxidation occurs in two stages. Only the stabilizers with benzene ring demonstrate the antioxidative action. The stabilizers VI and VII do not act as the antioxidants, and, moreover, as a consequence of their plasticizing properties, they facilitate the penetration of the oxygen to polymer. The epoxy groups have no influence upon the oxidation process, in the case of compounds VI and VII.