Processing maps based on polymerization modelling of thick methacrylic laminates

Gayot, Sarah;Bailly, Christian;Pardoen, Thomas;Gérard, Pierre;Van Loock, Frederik
(2020) Materials & Design — Vol. 196, p. 109170 (2020)

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Control of the in-situ polymerization of thick methacrylic laminates is essential to minimize cavitation due to monomer boiling. To this end, a computationally efficient thermochemical model is developed to predict the temperature and degree of monomer conversion during polymerization of a methyl methacrylate (MMA)- based resin in a fibrous preform. The model couples the self-accelerating exothermic free-radical bulk polymerization ofMMA(gel effect)with the heat transferwithin the preformand to the environment. The predicted temperature profiles are in excellent agreement with experimental data measured during a series of in-situ polymerization tests with different heating conditions and preform thicknesses. Processing diagrams are constructed to reveal the regimes of interest for the production of thick fiber-reinforced methacrylic composites without voids induced by monomer boiling.
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Gayot, S., Bailly, C., Pardoen, T., Gérard, P., & Van Loock, F. (2020). Processing maps based on polymerization modelling of thick methacrylic laminates. Materials & Design, 196, 109170. https://doi.org/10.1016/j.matdes.2020.109170 (Original work published 2020)