Simulation and control of solvent evaporation in the process of phenolic prepregs Production
Volume Title: 1
Authors
1Polymer engineering Group, Faculty of Materials and Manufacturing technologies, Malek-E-Ashtar University of Technology, Tehran, P.O.Box 15875-1774
2Polymer Engineering Group, Composite Research Institute, Malek Ashtar University of Technology, Tehran, Iran
3Polymer Group, Faculty of materials and Manufacturing Technologies, Malek-e-Ashtar University of Technology
Abstract
The control of the solvent evaporation process to determine the amount of volatile matter allows to achieve the optimum resin content for the desired prepreg. the purpose of this study was to investigate the effective parameters on the solvent evaporation process for controlling the volatile matter content, in order to improve the prepreg properties. The effect of impurities on the solvent evaporation reduces the vapor pressure and increases the boiling point, which makes the deviation from the ideal solution state. The degree of this deviation is measured by introducing a dimensionless coefficient called the beta (β) parameter.
According to the results, it was observed in the safe temperature range that at higher temperatures by decreasing the gage vapor pressure of the solution, the absolute vapor pressure of the solution increased then The solvent evaporates increased by decreasing value of the beta coefficient values. Beta experiment was also observed at cure-evaporation temperature range that the curing reaction progressed and the resin crosslinking increased, the beta coefficient with a positive deviation of The ideal state increased, resulting in an increase in solvent evaporation. Further, this results was observed by examining the relationship between the kinetics of resin curing and solvent evaporation.
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