An Efficient Thermal Cure Profile for Thick Parts Made by Reactive Processing of Acrylic Thermoplastic Composites

Journal of Composites Science

Angelo Petriccione¹  Giuseppe De Tommaso¹  Barbara Palmieri²  Alfonso Martone²  Michele Giordano² 

[1] Advanced Tools and Moulds srl, Zona Industriale ASI Stabilimento 13, 81030 Gricignano d’Aversa (CE), Italy;Institute for Polymers Composites and Biomaterials, National Research Council, Ple E Fermi 1, 80055 Portici (NA), Italy;

关键词: reactive thermoplastic;    process model;    exothermic reaction;    FRP;    kinetic model;   

DOI  :  10.3390/jcs5090229

来源: DOAJ

【 摘 要 】

The process of curing of large thick composite parts needs attention regarding the formation of residual stresses. Similarly, novel reactive thermoplastics need investigating to produce an efficient thermal cure profile that decreases the risk of warpage and residual stress. In this work, the polymerization kinetics of the Elium resin system is investigated by differential scanning calorimetry (DSC) tests, the analysis of thermo-grams, and the parameters of Kamal and Sourour’s semi-empirical model. A numerical model based on finite elements was set up to reproduce the temperature fields during part consolidation. Several processing conditions were investigated (dwell temperature, environment, heat exchange) in order to predict the thermal gradient within the part. The optimal cure profile was identified as a function of process parameters with the aim of minimizing the thermal gradient within the composite element. The analysis revealed that, for the reactive thermoplastic Elium, the consolidation in facilities with high thermal exchange may increase the risk of residual stresses within the parts, erasing the advantage of short cure cycles.

【 授权许可】

Unknown