Polydimethylsiloxane branched HEMA (SH) was prepared by reacting polydimethylsiloxane prepolymer and 2-hydroxyethyl methacrylate (HEMA). Polyacrylate modified polyorganosiloxane (SMPA) was prepared by polymerization of methacrylic acid(MA), allyl glycidyl ether(AGE), aminopropyltrimethoxysilane(APTS), and SH. Their structures were confirmed by the measurement of FTIR and 1H-NMR and thermal properties of SMPA were studied from TGA. Residual weight of SMPA at 400 ℃ increased according to increasing content of the APTS to 63 from 55%. SMPA sealant was prepared by adding additives, such as viscosity increasing agent, crosslinking agent, and fillers. Adhesion characteristics of SMPA-3 sealant was determined to be maximum load elongation, 2.01%, and break load elongation, 2.28%. Adhesion characteristics for SMPA sealant prepared from SMPA-3 were better than those for SMPA sealant prepared from SMPA-1 and SMPA-2.

Polydimethylsiloxane prepolymer와 2-hydroxyethyl methacrylate(HEMA)를 이용하여 polydimethylsiloxane을 도입한 HEMA(SH)를 제조하였다. 여기에 methacrylic acid (MA), allyl glycidyl ether(AGE) 및 aminopropyltrimethoxysilane(APTS)를 이용하여 실록산 변성 polyacrylate hybrid(SMPA)를 제조하고 이들의 구조를 FTIR 및 1H-NMR로 확인하였다. SMPA에 대한 내열특성을 TGA를 통해 측정한 결과 400 ℃에서 무게 잔존율(Wtr, %)은 APTS의 함량이 증가할수록 55에서 63%로 증가하여 나타났다. 제조한 SMPA에 증점제, 가교제 등의 각종 첨가제들을 가하여 SMPA 실란트를 제조하였다. 접착특성을 측정한 결과 SMPA-3를 이용하여 제조한 실란트의 경우 concrete와 금속사이의 최대 하중 신장률은 2.01%, 파괴 하중 신장률은 2.28%로 SMPA-1 및 SMPA-2를 이용하여 제조한 실란트의 1.07, 1.45%와 1.02, 1.35%인 경우보다 증가되었다.

Keywords: polydimethylsiloxane; polyacrylate modified polyorganosiloxane; aminopropyltrimethoxysilane; sealant