Study On Preparation And Property Of Glass Fiber Reinforced Light-Cured Resin Matrix Composites

Two kinds of dimethacrylate resin were prepared using visible light-cured technique. Optimal proportion of several monomers was conformed through reduplicate examination. The light-cured resin matrix composites were prepared with dimethacrylate oligomers as monomers, camphorquinone (CQ) and benzoate as photoinitiators, and glass fiber as reinforced materials. Mechanical property, friction and wear characteristics and polymerization volume shrinkage of them were investigated. Friction and wear surfaces and thermodynamics of the materials were analyzed with SEM and DSC.The result showed that it is possible to prepare glass fiber reinforced composites with light-cured technology. Mechanical property of resin materials could be effectively improved because of incorporation of fiber. At the same time the main mechanical properties were improved effectively with the increase of fiber volume. The conjointness between glass fiber and resin was effectively improved through coupling- agent surface treatment, so the performance of composites was improved. As for EEPE and GL/EEPE composites, photoinitiator and monomer content and fiber volume had no obvious effect on the temperature T2 at which the enthalpy of transformation of polymer was the most acute in course of heating. Wear condition had obvious effect on the wear-resistant of materials. The friction coefficient of dry-friction was higher than that of the friction under simulative body-lubrication．Wear rate can be reduced by incorporation of glass fiber, and the friction and wear properties of 3D-braided fiber reinforced composites were best among 3D-braided fiber reinforced composites, continuous fiber reinforced composites and resin matrix. Load and glide velocity had effect on friction and wear behavior of composites.Polymerization volume shrinkage of EEPE resin was lower than other dimethacrylate resin. The polymerization volume shrinkage of GL/EEPE composites and G3D/EEPE composites was almost close, but was higher than that of EEPE resin. At the same time volume shrinkage was reduced with the increase of fiber volume. Fiber reinforced light-cured resin matrix composites unite many characters of light-cured technology and composites。The preparation technics of the materials is very easy and mechanical properties of them are good. They can overcome the connatural shortcoming of traditional fracture exterior fixation materials, such as plywood and plaster cast, so they offer a new development direction for fracture exterior fixation materials. But study on light-cured reaction mechanism, functionality and actual application etc will be researched in the future.