TMA characterization of dental polymers

摘要

Thermomechanical analysis has been used to characterize the recoverable and non-recoverable creep, the setting properties, the hydrophilicity and polymerization shrinkage for different classes of dental impression elastomers. TMA's ability to measure small differences in linear expansion coefficients and to determine comparative creep moduli will be illustrated. The viscoelastic and thermal expansion properties of these elastomers are extremely important in making reproducible gypsum molds for prosthetic dentures.