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Synthesis and photodegradation behavior of polyethylene containing side‐chain keto ether groups
Author(s) -
Cernia E.,
Marconi W.,
Palladino N.,
Bacchin P.
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.1974.070180717
Subject(s) - photodegradation , acetophenone , substituent , photochemistry , chemistry , polymer chemistry , ether , polyethylene , copolymer , degradation (telecommunications) , polymer , organic chemistry , catalysis , photocatalysis , telecommunications , computer science
The synthesis and photochemical behavior of the polymers obtained by grafting diazoacetophenones and p ‐substituted diazoacetophenones onto an ethylene–vinyl alcohol copolymer were studied. Photodegradation proceeds through a primary process with generation of acetophenone (or the p ‐substituted acetophenone) and “in chain” keto groups. A secondary photochemical process sensitized by these two units leads to oxidative photodegradation. The degradation leads to lowering of the molecular weight in prevalence to crosslinking. The effect of the p ‐substitution on the acetophenone with electron‐withdrawing substituent has little effect on the degradation rate.