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Advanced Composites

Feb 10, 2017

Advanced composite materials refers to high-performance fibers such as carbon fibers, boron fibers and high-strength, high modulus organic fibers. By far the most important still is an epoxy resin matrix, reinforcing fabric was continuous fibers or fibers. Useful methods composite melt and solution dipping method fiber or fabric in a prepreg, and then heated in a mold compression molding. Solution method widely used today in the polyimide-based resin, polyimide has a high melting point as many, or can’t be re-dissolved after solidification. So take advantage of having a soluble precursor solution was dip. Thus arises a problem but the increase of the volatile components in the prepreg, improper handling will make composites with high porosity. Impact performance, while in the production process has also brought serious environmental problems. In order to avoid the use of solvents, it has also been reported to the county by the powder or mixed prepreg prepared prepreg. The former is the use of resin powder electrostatically attached to the charged fibers, which is spun into fibers and resin previously mixed woven reinforcement, and then pressed into a composite material. However, these methods have serious limitations. In order to improve the production efficiency of the composite material, reduce costs, resin transfer molding and resin infusion molding is greatly valued. These techniques require a matrix resin having a low melt viscosity, while the requirements of the resulting composite material having a high toughness.