title: Dynamic mechanical thermal analysis of dental polymers. III. Heterocyclic methacrylates.
abstract: 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.
authors.affiliation: Dental School, London Hospital Medical College, UK.
authors.forename: R L
authors.initials: RL
authors.lastname: Clarke
mesh_terms: D000179:Acrylates; D003764:Dental Materials; D004548:Elasticity; D006571:Heterocyclic Compounds; D066298:In Vitro Techniques; D008689:Methacrylates; D014783:Viscosity
chemical_list: D000179:Acrylates; D003764:Dental Materials; D006571:Heterocyclic Compounds; D008689:Methacrylates