Research Progress in the Preparation of Continuous Fiber-Reinforced Thermoplastic Composites by in-situ Polymerization Method
In situ polymerization method has lower resin viscosity compared to traditional hot melt method in preparing continuous fiber thermoplastic composite materials.It can be well wetted with reinforcing fiber at the microscopic scale and solidified in situ around the fiber for integrated molding.It is easier to produce large and complex shaped thermoplastic composite products,and the products have excellent mechanical properties and have attracted widespread attention in the industry.The in-depth study of the anionic polymerization mechanism of caprolactam(PA6)and the free radical polymerization mechanism of methyl methacrylate monomer(MMA),combined with the characteristics of pultrusion process and resin transfer molding(RTM)process,has attracted great interest in the industry in recent years for the preparation of thermoplastic composite materials by in-situ polymerization method.This article reviews the polymerization characteristics of common in-situ polymerization resin matrices and discusses their practical applications in pultrusion and RTM processes.
in situ polymerization methodPA6 anionic polymerizationMMA radical polymerizationpultrusion processresin transfer molding process(RTM)
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