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Morphology of photodegraded heterophasic ethylene–propylene copolymers
Author(s) -
Sarwade B. D.,
Singh R. P.
Publication year - 1999
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/(sici)1097-4628(19990411)72:2<215::aid-app7>3.0.co;2-8
Subject(s) - materials science , copolymer , polypropylene , photodegradation , ethylene propylene rubber , polyethylene , tacticity , scanning electron microscope , morphology (biology) , polymer chemistry , ethylene , polymer , chemical engineering , composite material , polymerization , chemistry , catalysis , organic chemistry , photocatalysis , biology , engineering , genetics
Abstract The morphology of photooxidative degraded films of heterophasic ethylene–propylene copolymer (EPQ‐30R) was investigated and compared with isotactic polypropylene and linear low‐density polyethylene by scanning electron microscopy. Surface damage caused by polychromatic ultraviolet irradiation (λ ≥ 290 nm) at 55°C in air is presented in different micrographs. Changes occurring due to the formation of polar groups during photooxidative degradation are discussed. Morphological study of these photodegraded polymer samples show very good correlation with the photodegradation results. The rate of photooxidation is very fast in case of isotactic polypropylene, compared with polyethylene and ethylene–propylene copolymers. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 215–225, 1999