Grafting reactions onto poly(organophosphazenes)-III. Light-induced graft copolymerization of poly-N,N′-dimethyl-acrylamide onto mobile-hydrogen-containing phosphazene polymers

✍ Scribed by Francesco Minto; Marco Scoponi; Mario Gleria; Fiorella Pradella; Pietro Bortolus

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 537 KB
• Volume: 30
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(94)90302-6

✦ Synopsis

In this paper we report the light-induced grafting copolymerization of N,N'-dimethylacrylamide onto four poly(organophosphazene) films i.e. poly[bis(4-isopropylphenoxy)phosphazene], poly[bis(4-s-butylphenoxy)phosphazene], poly[bis(4-benzylphenoxy)phosphazene] and poly[bis(2,2',2"-trifluoroethoxy)phosphazene]. The process was carried out in N,N'-dimethylacrylamide/methanol mixtures in presence of benzophenone as sensitizer.

The yield of the grafting process was evaluated as a function of the phosphazene structure, of the relative amounts of N,N'-dimethylacrylamide and methanol in the reaction mixtures, and of the swelling capability of the polymer films. The obtained polyphosphazene-g-poly-N,N'-dimethylacrylamide copolymers were characterized by i.r. spectroscopy, both ATR and transmission, and by contact angle measurements.