In this study, 1-chloro-3,3,3-trifluoropropene (HFO-1233zd), which has low ozone depletion potential and global warming potential, was used to synthesize the polyisocyanurate (PIR) foam and its mechanical strength and thermal properties were compared with foam synthesized using cyclopentane, a hydrocarbon-based blowing agent, and 1,1,1,3,3-pentafluoropropane (HFC-245fa), an alternative blowing agent to 1,1-dichloro-fluoroethane (HCFC-141b). PIR foam synthesized using HFO-1233zd showed the lowest thermal conductivity among foam synthesized using other blowing agents, confirming its superior insulation performance. Furthermore, its compressive strength was higher than that of the foam using cyclopentane, having strength similar to foam using HFC-245fa. According to the limited oxygen index (LOI) test, foam synthesized using cyclopentane showed the lowest LOI value (23.7%) while HFO-1233zd based foams scored the highest (26.3%) proving their excellence in flame retardancy.

본 연구에서는 오존층파괴지수와 지구온난화지수가 낮은 1-chloro-3,3,3-trifluoropropene(HFO-1233zd)와 탄화수소계 발포제인 cyclopentane 및 1,1-dichloro-fluoroethane(HCFC-141b)의 대체 발포제로 사용중인 1,1,1,3,3-pentafluoropropane(HFC-245fa)를 사용하여 polyisocyanurate(PIR) 폼을 합성한 후 발포제에 따른 폼의 열전도도와 기계적 강도 및 열적 성질을 비교하였다. HFO-1233zd를 사용하여 합성한 PIR 폼은 다른 발포제를 사용한 폼에 비해 낮은 열전도도를 나타내어 단열 성능이 가장 뛰어남을 확인하였으며, 압축강도 결과에서도 cyclopentane보다는 우수하고, HFC-245fa와 유사한 강도를 나타내었다. 한계산소지수(LOI) test결과 cyclopentane을 사용한 폼이 가장 낮은 LOI 값(23.7%)을 나타내었으며, HFO-1233zd를 사용하여 만든 폼이 가장 높은 값(26.3%)을 나타내어 난연성이 우수함을 확인하였다.

Keywords: polyisocyanurate, 1-chloro-3,3,3-trifluoropropene, 1,1,1,3,3-pentafluoropropane cyclopentane, flame retanrdancy.