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Related Experiment Videos

Onset of elasticity in setting elastomers.

J F McCabe1, T E Carrick

  • 1Dental Materials Science Unit, Dental School, University of Newcastle upon Tyne, England.

Journal of Dental Research
|September 1, 1990
PubMed
Summary

Detecting the onset of elasticity in setting elastomers is possible using a controlled stress-rheometer. Elastic recovery percentages correlated with specific phase angles in oscillatory tests, indicating material property changes.

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Area of Science:

  • Polymer Science
  • Materials Science
  • Rheology

Background:

  • Understanding the transition from liquid to solid states in elastomers is crucial for material processing and application.
  • Characterizing the development of elastic properties during elastomer setting is essential for predicting material performance.

Purpose of the Study:

  • To determine a reliable method for detecting the onset of elasticity in setting elastomers.
  • To correlate measurements from creep/recovery tests with oscillatory rheology data.

Main Methods:

  • Utilized a controlled stress-rheometer operating in creep/recovery mode.
  • Performed oscillatory rheology tests to determine the phase angle over time.

Main Results:

  • The onset of elasticity in setting elastomers was successfully detected using the rheometer.
  • A 5-20% elastic recovery in creep/recovery tests corresponded to a phase angle of 60 degrees in oscillatory tests.

Conclusions:

  • Creep/recovery rheometry provides a viable method for monitoring elastomer setting.
  • The phase angle of 60 degrees serves as a key indicator for the development of elastic properties in setting elastomers.

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