硅橡胶印模材料的流变学
The rheology of silicone rubber impression materials.
作者信息
Eyre D, van Noort R, Ellis B
出版信息
J Dent. 1989 Aug;17(4):171-6. doi: 10.1016/0300-5712(89)90070-5.
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.
对一系列硅橡胶印模材料在混合前后的流变特性进行了研究。所使用的技术是锥板粘度计和毛细管粘度计。发现所有印模材料均表现出假塑性行为，可用幂律函数轻松描述。对于混合材料，分子缠结的开始虽然在理论上确定了工作时间的绝对终点，但却大大高估了临床工作时间。在提供有关临床工作时间的信息方面，毛细管粘度计比锥板粘度计更有用。
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