A model was developed to simulate the Reaction Injection Molding Process of unsaturated polyester rosin. The model simultaneously solved the balance equations for chemical species, momentum and energy by a computer simulation. Unsaturated polyester with compositions of phthalic anhydride, propylene glycol and fumaric acid with styrene was used. The reaction of unsaturated polyester resin was initiated by methyl ethyl ketone peroxide and promoted by cobalt naphthenate. The reaction kinetics was studied in a quasi-adiabatic reactor, and an empirical viscosity function was also developed. The effects of initiator concentration, fill time, mold thickness and overall heat transfer coefficient were evaluated through computer simulation. Actual Reaction Injection Molding experiment using acrylic mold was carried out and the experimentally obtained temperature profiles were compared with computer simulation results.

불포화 폴리에스터 수지를 반응사출성형 공정을 통해 가공하고자 할 때 금형 안에서 생기는 여러가지 현상을 예측하기 위하여 간단한 모델을 세운 후 콤퓨터를 이용한 모사를 행하였다. 반응물질로 사용한 불포화 폴리에스터는 phthalic anhydride, propylene glycol과 fumaric acid를 1 : 2. 16 : 1의 몰비로 합성한 물질이었고 methyl ethyl ketane peroxide를 개시제로 cobalt naphthenate를 촉진제로 사용하였다. 반응속도식은 단열반응기를 사용하여 구하였으며 실험적으로 점도함수를 구하여 콤퓨터모사에 사용하였다. 콤퓨터모사에서는 개시제 농도, 충전시간, 금형두께, 총괄 열전달 계수에 의한 영향을 알아 보았다. 또한 실험실적으로 아크릴 금형을 사용한 반응사출성형 장치를 만들어 콤퓨터모사 결과와 비교하여 보았다.