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Radiation‐induced crosslinking and grafting of two polyphosphazene elastomers
Author(s) -
Grune G. L.,
Stannett V. T.,
Chern R. T.,
Harada J.
Publication year - 1993
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1993.220040504
Subject(s) - elastomer , polyphosphazene , materials science , grafting , polymer , polymer chemistry , solvent , acrylic acid , irradiation , allylic rearrangement , polymer science , copolymer , nuclear chemistry , composite material , organic chemistry , chemistry , physics , catalysis , nuclear physics
The radiation‐induced crosslinking and grafting of two aryloxy‐substituted elastomeric polyphosphazenes have been carried out by both gamma and electron beam irradiation. The classic Charlesby–Pinner [1] plus a simpler approach were used to determine the G(X) values for the crosslinked elastomeric polymers. The apparent G(X) value for the same polymer depended on whether the gamma‐ray or the E‐beam results were used. The presence of 8.5% repeat units with allylic groups in the side chain increased the G(X) value by an order of magnitude when the irradiation was performed under vacuum with the gamma source. The extent of acrylic acid grafting was also higher for the polymer containing the allylic group. Nearly all the grafted polyphosphazene films were insoluble in THF, a good solvent for the ungrafted samples.