Surface Studies of Poly(Organophosphazenes) Containing Dimethylsiloxane Grafts.
Abstract
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 trifluoro- ethoxy 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 allyl-functional polymer and heptamethyltrisiloxane dissolved in non-solvents for the polymer. Polymer films showed the presence of silicon to depths of 25-60 micrometers as measured by energy dispersive X-ray spectroscopy. jg
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 06, 1995
- Accession Number
- ADA291909
Entities
People
- Dawn E. Smith
- Harry R. Allcock
Organizations
- Pennsylvania State University