The effect of addition of two new urethane prepolymers on the mechanical properties of unsaturated polyester resins and glass-fiber-reinforced plastics based on them is investigated. The effect of concentration of these additives on the elastic modulus, elongation at break, and flexural strength of hardened orthophthalic resins is evaluated. A significant increase in the strength of the binders and glass-fiber-reinforced plastics (GFRPs) based on them is observed upon adding urethane prepolymers to the resins. The properties of laminated and randomly reinforced glass-fiber plastics with the modified orthophthalic resins are compared with those of similar GFRPs based on popular brands of industrial resins.
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Translated from Mekhanika Kompozitnykh Materialov, Vol. 49, No. 5, pp. 791-800 , September-October, 2013.
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Yakushin, V., Jansons, J., Bulmanis, V. et al. Modification of polyester resins during molding of glass-fiber-reinforced plastics. Mech Compos Mater 49, 531–536 (2013). https://doi.org/10.1007/s11029-013-9369-8
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DOI: https://doi.org/10.1007/s11029-013-9369-8