Grafting reactions onto poly(organophosphazenes), 7. Light-induced grafting of poly(vinyl acetate) onto catena-poly[bis(4-methyl-, 4-ethyl- and 4-sec-butylphenoxy)-λ5-phosphazene] and successive hydrolysis to phosphazenegrafted poly(vinyl alcohol)
✍ Scribed by Francesco Minto; Luca Fambri; Mario Gleria
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 744 KB
- Volume
- 197
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
In this paper we describe the light‐induced grafting reaction of poly(vinyl acetate) onto catena‐poly[bis(4‐sec‐butylphenoxy)‐λ^5^‐phosphazene], catena‐poly[bis(4‐ethylphenoxy)‐λ^5^‐phosphazene] and catena‐poly[bis(4‐methylphenoxy)‐λ^5^‐phosphazene], and the successive acid‐ (and base‐) catalyzed hydrolysis of the grafted macromolecule to poly‐(vinyl alcohol). The process was found to be dependent on the irradiation time, reaction temperature, relative monomer/methanol concentration in the reaction mixture, type of substituents present on the exploited phosphazene polymers, and on the crystallinity of these macromolecules. The new phosphazene grafted copolymers thus prepared have been characterized by IR spectroscopy, gravimetric analysis and contact angle measurements.