PERMANENT SET AND STRESS-RELAXATION IN ELASTOMERIC IMPRESSION MATERIALS

被引：7
|
作者：
COOK, WD
机构：
[1] Australian Dent. Stds Lab., Abbotsford, Victoria, Australia
来源：
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH | 1981年 / 15卷 / 04期
关键词：
POLYMERIZATION - Condensation Reactions - POLYSULFIDES - Rheology - SILICONES - Rheology;
D O I：
10.1002/jbm.820150402
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
The permanent set of a range of elastomeric impression materials, used in dentistry, was investigated as a function of the materials' 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.
引用
收藏
页码：449 / 463
页数：15
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