The Preparation of Tripodal Hybrid Hyperbranched Polymers

초록

Novel tripodal hybrid hyperbranched polymers based on organosilanes and organic groups were prepared using hydrosilation with following conditions: reaction temperature of 90 C, polymerization time of 18 hrs, and Pt(dvs) as a catalyst. The products were characterized by IR and H, C, Si NMR and showed amber-colored resin in room temperature. From the GPC result, it was founded that the degree of polymerization was rather low with the molecular weight of 1500 g/mol. The thermal analysis showed that the hyperbranched polymers exhibited low Tg ranging from -114 to -83 C. They decomposed at the temperature ranging from 462 to 492 C and converted to ceramic materials at 800 C with the char yield of 16-47%. The UV-visible-NIR spectra of the polymers showed broad absorptions in the 300-320 nm region, which is red shifted, compared to phenyl group (260 nm), due to the conjugation effect. The conductivity and fluorescence properties of hyperbranched polymer were also investigated.