Abstract
Abstract A mathematical model of the thermoplastic structural foam molding process utilizing a chemical blowing agent is described. First, an analytical solution of bubble growth in a Newtonian polymer melt is developed for isothermal conditions by neglecting the inertial and surface tension effects. Next, a numerical scheme for the solution of the nonisothermal case is developed by introducing a heat conduction equation including the reaction heat of chemical blowing agent decomposition. the effects of processing parameters such as processing temperature, concentration of blowing agent, and kinetics of decomposition reaction of blowing agent are discussed through numerical computations.
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