The rheology of silicone rubber impression materials.
A selection of silicone rubber impression materials were studied for their rheological properties prior to and following mixing. The techniques used were a cone and plate viscometer and a capillary viscometer. All the impression materials were found to show pseudoplastic behaviour which is readily described by a power law function. For the mixed materials the onset of molecular entanglement, whilst theoretically establishing the absolute end of the working time, gave a gross overestimate of the clinical working time. The capillary viscometer is more useful than the cone and plate viscometer in providing information on the clinical working time.
Eyre
D
D
van Noort
R
R
Ellis
B
B
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003760:Dental Impression Materials; D004548:Elasticity; D009824:Ointments; D010969:Plastics; D012212:Rheology; D012826:Silicone Elastomers; D013314:Stress, Mechanical; D013997:Time Factors; D014783:Viscosity
D003760:Dental Impression Materials; D009824:Ointments; D010969:Plastics; D012826:Silicone Elastomers