Abstract
The well-defined copolymers derived from Epichlorohydrin(ECH), Tetrahydrofuran(THF) were synthesized by Cationic ring-opening polymerization(CROP) with 1,4-Butandiol, a initiator, and $BF_3THF$ Complex, a catalyst via Activated monomer mechanism, which could lead to hydroxyl-terminated polyethers. The molecular weight of polymers were dependant on the ratio of [monomer]/[diol], Copolymer structures were controlled by monomers feed ratio, ECH and THF added. This polymers were functionalized from Chlorine group to Azide group using $S_N2$ reaction. Synthesized polymers were found to be as the prepolymer for polyurethane. Polyurethane was synthesized in the presence of N-100/IPDI mixture, a curing agent, and TPB(triphenyl bismuth)/MA(Maleic anhydride) mixture, a catalyst system. The curing behavior and mechanical properties of polyurethane after mixing with various prepolymer’s composition and the molecular weight were studied.
양이온 개환중합법을 이용하여 Epichlorohydrin(ECH)과 Tetrahydrofuran(THF)을 공중합 하였다. 중합은 1,4-Butandiol 존재 하에 $BF_3THF$를 촉매로 사용하여 잘 제어된 Copolyetherdiol을 합성하였다. 분자량은 [monomer]/[diol]비를 조절하였고, 공중합체 조성은 ECH와 THF의 투입몰비를 변화하여 조절하였다. 합성된 Copolyetherdiol의 Chlorine기는$S_N2$반응을 이용하여 Azide기로 치환하였다. 합성된 고분자를 프리폴리머로 사용하여 경화제인 N-100/IPDI와 경화촉매인 TPB/MA 혼합촉매를 이용하여 Polyurethane을 합성하여 경화거동과 기계적 특성은 비교 분석하였다.
