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Some aspects of stabilization and degradation of nigerian natural rubber (II): The environmental degradation of DBHBT‐modified unprocessed, unvulcanized nigerian natural rubber
Author(s) -
Ebi G. C.,
Kolawole E. G.
Publication year - 1992
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.1992.070451220
Subject(s) - natural rubber , degradation (telecommunications) , materials science , sulfate , hevea , allylic rearrangement , chemical engineering , polymer chemistry , chemistry , composite material , hevea brasiliensis , organic chemistry , catalysis , metallurgy , telecommunications , computer science , engineering
3,5‐Di‐ tert ‐butyl‐4‐hydroxybenzyl thioglycollate (DBHBT) was bound to the natural rubber ( Hevea Brasilenisis ) latex using 4,4'‐azobiscyanovaleric (AZBN) acid‐ferrous sulfate redox system. The degradation of various dilutions of the master batch as cast films under environmental influence has been investigated using spectroscopic method. Latex‐bound DBHBT protects natural rubber latex against environmental degradation with an optimum concentration around 50%. The formation of C0 groups by some pathways independent of OH groups and allylic hydrogen atoms has been suggested in the natural weathering of DBHBT‐modified and unprocessed natural rubber.