아크릴 폴리올을 이용한 폴리우레탄 발포체의 특성 연구

Abstract

Polyester type polyurethane foam have low hydrolysis resistance. It was covered with acrylic polyol and made by quasi prepolymer method. Also, physical and thermal properties was measured for their specific properties. Polyurethane foam contained acrylic polyol was increased tensile strength and hardness with increase of acrylic polyol contents. But split tear strength and tear strength was slightly changed. Hydrolysis resistance of polyurethane foam was measured by loss % of tensile strength. It was elevated with acrylic polyol contents from 5% to 20% increase. Thermal properties was analysed by Differential scanning calorimeter(DSC), Thermalgravimetric analysis(TGA) and Dynamic mechanical analysis(DMA). Glass transition temperature measured by DSC and thermal stability measured by TGA was slightly decreased. Last, dynamic mechanical properties was measured by DMA. Storage modulus was increased and tan delta was decreased with increase of acrylic polyol contents.