Dynamic mechanical thermal analysis of dental polymers. III. Heterocyclic methacrylates.
Four heterocyclic methacrylates were investigated with respect to their loss tangent and activation energy using a dynamic mechanical thermal analyser over a limited frequency range of 0.033 to 90 Hz. The linear regression lines obtained showed an Arrhenius-type relationship between transition temperature and frequency. Their low activation energies in comparison to poly(methyl methacrylate) and bis-phenol A based methacrylates was thought to be a direct consequence of their low molecular weights.
Clarke
R L
RL
Dental School, London Hospital Medical College, UK.
D000179:Acrylates; D003764:Dental Materials; D004548:Elasticity; D006571:Heterocyclic Compounds; D066298:In Vitro Techniques; D008689:Methacrylates; D014783:Viscosity
D000179:Acrylates; D003764:Dental Materials; D006571:Heterocyclic Compounds; D008689:Methacrylates