Poly(organophosphazenes) containing dimethylsiloxane grafts were synthesized by carrying out hydrosilylation reactions on polymer precursors that contained unsaturated side groups. The surface properties of the siloxane-containing polymers were studied by contact-angle measurements and X-ray photoelectron spectroscopy. A cosubstituent poly(organophosphazene) containing both trifluoroethoxy side groups and grafted dimethylsiloxane side groups was found to have a surface rich in -CF3 groups. A poly(organophosphazene) with siloxane grafts but phenoxy groups as the second substituent showed surface enrichment of the siloxane species. Surface-specific hydrosilylation reactions were detected between an allylfunctional polymer and heptamethyltrisiloxane dissolved in nonsolvents for the polymer. Polymer films showed the presence of silicon to depths of 25-60µm as measured by energydispersive X-ray spectroscopy.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Materials Chemistry