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Effects of gamma radiation on the dynamic mechanical and swelling behavior of styrene butadiene block and random copolymers
Author(s) -
Samuels Sam L.,
Wilkes Garth L.
Publication year - 1973
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760130407
Subject(s) - copolymer , swelling , materials science , toluene , solvent , styrene butadiene , styrene , composite material , radiation , dynamic mechanical analysis , polymer chemistry , polymer , organic chemistry , chemistry , optics , physics
The physical structure of a number of styrene‐butadiene copolymers were investigated via dynamic mechanical and swelling studies on uncrosslinked and gamma‐radiation cross‐linked films that had initially been solvent cast from toluene or methyl ethyl ketone. The mechanical behavior of these films before and after crosslinking was found to depend on the material history as well as the chemical structure of the copolymer, in agreement with observations made by other experimental techniques. A simple morphological interpretation was given to the dynamic mechanical spectra as a function of radiation dosage and a limited discussion of the swelling behavior is included.