1988 Volume 45 Issue 6 Pages 481-484
To study the effects of whiskers on reinforcement of dental restorative resin, the mechanical breaking strengths and proportional limits were measured by means of compressive, tensile, and bending tests for composites composed of (1) a copolymer of 2, 2-bis [4- (3-methacryloxy-2-hydroxypropoxyl) phenyl] propane and triethylene glycol dimethacrylate and (2) silicon nitride (Si3N4) or potassium titanate (K2O·6TiO2 or K2O·6TiO2·1/2H2O) whiskers or the same whiskers treated with γ-methacryloxy propyl trimethoxysilane (I), γ-amino propyl triethoxysilane (II), or γ-glycidoxy propyltrimethoxysilane (III). In the case of I, the two mechanical values of the composites containing the treated whiskers were greater than those of the composites containing nontreated whiskers at every volume fraction of the whiskers, while in the cases of II and III the observed treating effects were within experimental error of the values for K2O·6TiO2 whiskers. With increasing mean axial ratio of the whiskers, the values of the proportional limits increased for all the composites containing either nontreated whiskers or those treated with I.
