A novel and facile method for direct synthesis of cross-linked polysiloxanes by anionic ring-opening copolymerization with Ph-12-POSS/D-4/Ph8D4

作者：Li HY; Yu DS; Zhang JY^*

来源：Polymer, 2005, 46(14): 5317-5323.

DOI：10.1016/j.polymer.2005.04.028

• POSS
• cross-linked polysiloxane
• anionic ring-opening copolymerization

The cross-linked polysiloxanes were directly synthesized by anionic ring-opening copolymerization of Ph-12-POSS as multifunctional monomer with D-4 and Ph8D4 under KOH or Me4NOH siloxanolate. And the influences of the polar additive DMAc on gelation time were investigated. The results of gel content and swelling ratio, GPC, solid-state Si-29 and C-13 NMR, FT-IR, WAXD showed that Ph-12-POSS was reacted and most of the product was cross-linked. The DSC and TG results indicated that the cross-linked polysiloxanes exhibited distinct glass transition temperatures (T-g) and excellent thermal stability. Compared to that with KOH siloxanolate, the cross-linked polysiloxane synthesized with Me4NOH siloxanolate has more preferable thermal stability.

• 出版日期2005-6-27
• 单位北京化工大学