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Grafting reactions onto poly(organophosphazenes). IV. Light‐induced graft copolymerization of organic polymers containing free acid or basic functionalities onto poly[bis(4‐benzylphenoxy)phosphazene]
Author(s) -
Minto Francesco,
Gleria Mario,
Bortolus Pietro,
Fambri Luca,
Pegoretti Alessandro
Publication year - 1995
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.1995.070560612
Subject(s) - phosphazene , copolymer , polymer chemistry , monomer , photoinitiator , grafting , acrylic acid , benzophenone , methacrylic acid , benzoin , materials science , chemistry , polymer , organic chemistry
The light‐induced graft copolymerization of acrylic acid, methacrylic acid, and 4‐vinylpyridine onto poly[bis(4‐benzylphenoxy)phosphazene] films to prepare new grafted phosphazene copolymers containing acid and basic functionalities is reported. The process was carried out in monomer/methanol mixtures in the presence of benzophenone or benzoin ethyl ether as photosensitizers by selective excitation of these last species. The yield of the grafting processes was evaluated as a function of the monomer concentration in the reaction medium, type of photoinitiator, and characteristics of the grafted organic monomers. The acid functions inserted in poly[bis(4‐benzylphenoxy)phosphazene]‐ g ‐poly(meth)acrylic acid grafted copolymers, and the basic groups of the poly[bis(4‐benzylphenoxy)phosphazene]‐ g ‐poly‐4‐vinylpyridine substrates were allowed to interact with basic and acid dyes, respectively, to form permanently colored polymeric films. The photoactivity of these films as substrates for the photosensitized production of singlet oxygen was tested. © 1995 John Wiley & Sons, Inc.