Research progress in the preparation of fiber reinforced thermoplastic resin prepreg

Abstract

Thermoplastic composite materials are widely used in automobile, aerospace and military fields due to their advantages of high impact toughness, recyclability and excellent environmental adaptability. However, the high viscosity of the thermoplastic resin after melting makes it difficult to impregnate the fiber adequately. As the intermediate material of composite materials, the preparation of prepreg has been relatively mature. The fibers in the prepreg have been impregnated with resin, so the composite material prepared by the prepreg has fewer voids. The preparation method of thermoplastic prepreg and analysis of the advantages and disadvantages of various preparation methods were introduced in this paper, including solution impregnation, melt impregnation, powder impregnation, film stacking lamination, commingled yarns and reactive of chain growth impregnation. The impregnation mechanism of melt infiltrated fibers was described and some research results of impregnation mechanism were summarized. The effects of parameters such as immersion temperature, immersion pressure and traction speed on the properties of prepreg were discussed. Finally, the main problems and the development direction in the production of prepreg were summarized. In the future, methods such as multidisciplinary integration, fiber and resin modification and computer simulation of the impregnation process can be used to promote the industrial development of thermoplastic prepreg.

Keywords

• thermoplastic composite
• prepreg
• impregnation mechanism
• impregnation process