Preparation and Thermal Performance of Polysiloxane Containing Imide Ring.

An polysiloxane containing imide ring was synthesized by the reaction of bisphenol A diether diene (BPADAAA) with 1,1,3,3-tetramethyldisiloxane under the action of speier catalyst. The polysiloxane containing imide ring with special POSS structure was prepared by the reaction of imide ring silane coupling agent (BPADA-AA-TES) with water. The structure and performance of the two polysiloxanes were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analyzer (TG) and differential scanning calorimeter (DSC). The results show that the glass transition temperature (Tg) of polysiloxane containing imide ring is 251 °C, and the 10% decomposition temperature (Td10%) is 474 °C. The T_g and T_d10% of polysiloxane containing imide ring with POSS structure are 211 °C and 452 °C, respectively. The thermal performance of polysiloxane containing imide ring are better than those of polysiloxane containing imide ring with POSS structure. The synthesized polysiloxane containing imide ring has good thermal performance and can be used as a coating material for in-situ polymerization process. [ABSTRACT FROM AUTHOR]