| 초록 |
Linear polysiloxanes with different amounts of polyhedral oligomeric silsequioxane (POSS) side groups were prepared through hydrosilylation reaction of poly(ethylhydrosiloxane) with different amount of POSS and 1-octene using platinum(0)-divinyl tetramethyldisiloxane as a catayst. 1-Octene and platinum(0)-divinyl tetramethyldisiloxane were found to be very important for the preparation of the linear polymer without any cross-linked structures. The linear polysiloxanes with POSS side groups were soluble in common organic solvents. The resulting structure was confirmed by FT-IR and 1H-NMR spectroscopy. The thermal analysis of the hybrid material was determined by TGA and DSC. As the POSS content increases, glass transition temperature, decomposition temperature, char yield, modulus, and viscosity increase. When the content of POSS side group is larger than 10 mol%, free standing films can be prepared from solution casting method easily, although these polysiloxanes are not cross-linked. |
