Macro level composite specimens of treated Carbon Fiber(CF)and Kevlar Fiber(KF)cloths sandwiched by PMMA resin, and micro level molecular composites composed of PMMA resin as matrix reinforced with polyaramides as rigid core molecules have been developed to produce denture base polymers with improved physical properties.The interaction between surface treated fiber cloths and the matrix resin in the fiber reinforced composites was investigated using a Dynamic Mechanical Thermal Analyser(DMTA).In conclusion PMMA resins composed of the polyaramide molecule of straight main chain have suitable dental material properties.