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Resonance

, Volume 24, Issue 2, pp 217–238 | Cite as

Rubber as an Aid to Teach Thermodynamics

The Discovery by a Blind Scientist
  • V. G. GeethammaEmail author
  • V. SampathEmail author
General Article
  • 6 Downloads

Abstract

The behaviour of rubber differs from that of conventional materials. Rubber heats up on stretching and cools on retraction. Also, stretched rubber shrinks on heating (thermoelastic shrinkage) while a stretched metal elongates. The elastic recovery of rubber is due to its tendency to maximize the entropy. The same property also causes the thermoelastic shrinkage. Metallic materials possess energy elasticity, while ideal rubber possesses entropy elasticity. The thermodynamic behaviour of rubber is similar to that of gaseous materials. Hence rubber can be used as an aid for teaching thermodynamics.

Keywords

Gough–Joule effect rubber thermoelastic entropy elasticity adiabatic isothermal thermodynamics teaching aid strain-induced crystallisation elastomer 

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Copyright information

© Indian Academy of Sciences 2019

Authors and Affiliations

  1. 1.Department of Polymer EngineeringUniversity College of EngineeringThodupuzhaIndia
  2. 2.Department of Metallurgical and Materials EngineeringIndian Institute of TechnologyMadras, ChennaiIndia

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