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Permanent set and stress relaxation in elastomeric impression materials

✍ Scribed by Cook, Wayne D.

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
739 KB
Volume
15
Category
Article
ISSN
0021-9304

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✦ Synopsis

Abstract

The permanent set of a range of elastomeric impression materials, used in dentistry, was investigated as a function of the materialsβ€² age and the duration and level of the deformation. The permanent set appears to be primarily controlled by the rate of polymerization at the time of deformation. However, stress relaxation experiments revealed that, for condensation silicone and in particular polysulfide elastomers, bond interchange reactions produce additional permanent set. The rate of recovery of the elastomers from deformation was very rapid and was consistent with the influence of entanglements in the network.

πŸ“œ SIMILAR VOLUMES

Rheological studies of the polymerizatio
Rheological studies of the polymerization of elastomeric impression materials. III. Dynamic stress relaxation modulus
✍ Cook, Wayne D. πŸ“‚ Article πŸ“… 1982 πŸ› John Wiley and Sons 🌐 English βš– 640 KB

## Abstract As part of a detailed study of the curing of a range of dental elastomeric impression materials, the 10‐s stress relaxation modulus was measured as a function of the curing time. The influence of the catalyst/base ratio was also investigated and compared with the pregel viscosity previo

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Rheological studies of the polymerization of elastomeric impression materials. I. Network structure of the set state
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## Abstract As part of the detailed study of the curing of a range of dental elastomeric impression materials, their chemistry was investigated. This information, the dependence of the stress relaxation modulus of the set material on the catalyst/base ratios, and the level of diluent were used to e