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Analysis of reaction injection molding process of polyurethane‐unsaturated polyester blends. Part I: Computer simulation
Author(s) -
Kim J. H.,
Kim S. C.
Publication year - 1987
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760271607
Subject(s) - materials science , exothermic reaction , polyurethane , polyester , composite material , mold , molding (decorative) , viscosity , process (computing) , sheet moulding compound , kinetics , thermodynamics , computer science , physics , quantum mechanics , operating system
A computer simulation model was developed to analyze the reaction injection molding (RIM) process of polyurethane and unsaturated polyester blends. The reaction kinetics and viscosity functions of each component were obtained through actual experiments, and a mathematical scheme for numerical calculation was set up in cylindrical coordinates to predict the temperature and conversion profiles within a disc‐type mold. The temperature change calculated from the simulation was compared with the temperature rise measured in actual RIM experiments. The effects of the feed temperature, wall temperature, and catalyst levels on the maximum exothermic temperature and the demolding time were evaluated in a search for the optimum processing conditions.