| 초록 |
Catalytic mechanism of commercial curing agent for polyurethane reaction of hydroxyl-terminated polybutadiene (HTPB) and Isophorone diisocyanate(IPDI) was investigated by the comparative study with triphenyl bismuth (TPB), dibutyltin dilaurate (DBTDL). The on-set temperature for curing was characterized through the differential scanning calorimetry (DSC) and the activation kinetics were analyzed through the different scanning rates (2, 5, 10, 20 and 50 ℃/min). During the polyurethane reaction of HTPB-IPDI, the soft and light curing reaction with non-catalyst were taken place at around 160~180 ℃. The curing temperature for polyurethane reaction with commercialized TPB and DBTDL catalysts were 100~160 ℃ for soft curing. Therefore, it can be found that the curing temperature (Tp) can be decreased by the application of catalysts. In addition, it was found that the curing temperature can be effectively confirmed by DSC. |
