α, ω-Hydroxybutyl polymethylphenylsiloxane was prepared by the equilibrium polymerization of cyclomethylphenyltrisiloxane, which was synthesised from methylphenyldichlorosilane under ZnO catalyst. Polyurethane modified with polyorganosiloxane elastomer was prepared from polyorganosiloxane prepolymer and polyurethane prepolymer, which had terminated diisocyanate group. α, ω-trimethoxysilyl polyurethane modified with polyorganosiloxane hybride elastomer (CUMPS) was prepared by the reaction of polyurethane modified with polyorganosiloxane elastomer and aminopropyltrimethoxysilane. Their structures were confirmed by the measurement of FT-IR and NMR, and the thermal properties were studied from DSC and TGA. Glass transition temperature of CUMPS exhibited exothermic peak at -41.8 ℃, and residual weight was 29 31% at 800 ℃ in air. Adhesion characteristics, elongation and load for CUMPS, prepared from polymethylphenylsiloxane, were better than CUMPS that was prepared from polydimethylsiloxane and polydiphenylsiloxane.

ZnO 촉매 하에서 methyl 및 phenyl 등의 각종 치환기가 도입된 cyclotrisiloxane을 합성한 다음 이를 평형 중합시켜 양말단에 hydroxyl기를 갖는 polyorganosiloxane prepolymer를 제조하였으며 이들을 말단에 isocyanate기를 갖는 polyurethane prepolymer와 반응시킨 다음 양말단에 trimethoxysilyl를 도입하여 polyorganosiloxane 변성 polyurethane hybrid (CUMPS) 탄성체를 제조하였다. 이들의 구조를 FT-IR 및 NMR로 확인하고 DSC 및 TGA로 열적 특성을 측정하였다. DSC 및 TGA 측정 결과 phenyl기가 도입된 CUMPS의 유리전이온도 및 800 ℃에서무게 잔존율은 각각 -41.8 ℃ 및 29.3%였고 접착 특성, 신장률 및 하중은 polymethylphenylsiloxane으로 변성된 CUMPS 탄성체가 polydimethylsiloxane이나 polydiphenylsiloxane으로 변성된 CUMPS 탄성체보다 우수하였다.