Abstract
The experimental acrylic resins containing 2, 2, 2-trifluoroethyl methacrylate (TFEMA) were prepared and their mechanical properties and physical characteristics were compared with ordinary methyl methacrylate (MMA)-poly(methyl methacrylate) (PMMA) resins. In the cases of TFEMA-MMA copolymers prepared by bulk polymerization, tensile strength and transverse strength were decreased with increasing amount of TFEMA beyond 50wt%. However, this tendency was not significant for dough molding type resins, and the best properties were observed for the resin composed of poly-TFEMA (PTEMA) as a powder and MMA as a powder and MMA as a liquid. The introduction of TFEMA units into resins reduced their Brinell and Knoop hardness numbers above 30wt% of TFEMA content, and the reduction in hardness was smaller for dough molding type resins, compared with resins prepared by bulk polymerization. Water sorption and contact angle depended on the concentration of TFEMA units in cured resins, regardless of their polymerization methods. The water sorption of PTFEMA resin was found to be 0.1 mg/cm2, which was about one fifteenth of the value for the control acrylic resin. The results of albumin adsorption onto resin surfaces revealed that the fluorinated dough molding type resin reduced the relative amount of the protein adsorbed, when compared with the control acrylic resin.
