ISSN:
1572-8870
Keywords:
Poly(organophosphazenes): grafting kinetics
;
polyvinylacetate
;
polyvinylalcohol
;
surface analysis
;
thermomechanical characterization
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract In this paper we report the light-induced grafting kinetics of vinyl acetate onto three poly(organophosphazene) films, i.e., poly[bis(4-methylphenoxy) phosphazene], poly[bis(4-ethylphenoxy)phosphazene], and poly[bis(4-secbutylphenoxy)phosphazene], and the characterization of the poly(organophosphazene)-g-poly-vinylacetate materials and the poly(organophosphazene)-g-poly-vinylalcohol copolymers, derived from hydrolysis of the previous ones. The reactivity of poly(organophosphazenes) was found to be directly dependent on the different crystallinity content. The modification of the surface properties was studied by SEM analysis and DCA measurements. The higher the grafting pereentage, the higher the roughness of surface and the lower the receeding contact angle. DSC analysis revealed that the crystallizability of poly(organophosphazene)-g-poly-vinylacetate decreases as the grafting percentage increases. Finally, DMTA measurements confirmed the presence of polyvinylacetate after grafting and its disappearance and the simultaneous increase in thermomechanical stability after hydrolysis.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01057747
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