Interpenetrating polymer networks of poly(dimethylsiloxane) with polystyrene, polybutadiene and poly(glycerylpropoxytriacrylate)

✍ Scribed by E. Elif Hamurcu; Bahattin M. Baysal

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 663 KB
• Volume: 196
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1995.021960425

✦ Synopsis

The synthesis of full and semi interpenetrating networks (IPNs) based on poly(dimethy1siloxane) (PDMS)/polystyrene, PDMS/polybutadiene and PDMS/poly(glycerylpropoxytriacrylate)a) is described. PDMS was used as host polymer in most cases. PDMS networks were prepared with two prepolymefs having different number-average molecular weights between junctions, a, = 15. lo3 and M, = 75 * lo3. Physical properties of IPN samples such as stressstrain behaviour, swelling and glass transition temperature (Tg) were examined. IPNs of both PDMS/polystyrene and PDMS/poly(glycerylpropoxytriacrylate) exhibit superior mechanical and elastomeric properties with respect to pure PDMS network. Most of the IPN systems studied in this work display two Tgs and indicate phase separation.