Physics of Rubber Elasticity (PHRE)
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Follow on Instagram for UpdatesPhysics of Rubber Elasticity (PHRE) Syllabus — Unit-wise Content
The official GTU curriculum for Physics of Rubber Elasticity (PHRE) (subject code 2724008) as prescribed for RE · Semester 2 divides the course into 7 units, covering 44 listed topics. The unit-wise breakdown below is read from the GTU syllabus document for this subject code, so you can check what the course actually covers before deciding which papers to attempt.
Download the official syllabus PDF (2724008)Unit 1 General Physical Properties of Rubber
- Chemical constitution of rubbers
- Early theories of Rubber Elasticity
- The Kinetic theory of Elasticity
- Cross-Linking and Vulcanisation: network theory
- The glass-rubber transition
- Crystallization in raw rubber
- Crystallization in the stretched state
- Photoelastic Properties of Rubbers etc
Unit 2 Internal Energy and Entropy Changes on Deformation
- Stress-temperature relations
- Thermodynamic analysis
- Application to experimental data
- Interpretation of thermoplastic data
- Thermal effects of extension
Unit 3 The Elasticity of Long-Chain Molecules
- Statistical Properties of Long-chain molecules
- Statistical form of Long- chain molecule
- The randomly jointed chain
- Properties of Gaussian functions
- The distribution of r-values
- Equivalent random chain
- The entropy of a single chain
- the tension on a chain
Unit 4 The Elasticity of a Molecular Network
- The nature of the problem
- Detailed development of the theory
- Significance of theoretical conclusions
- The principal stresses
- Significance of single elastic constant
- The elastic properties of a swollen rubber
- Development of the theory by James and Guth
- Network imperfections :’loose end’ corrections
Unit 5 Experimental Examination of The statistical Theory
- Particular stress-strain relations
- Experimental examination of stress-strain relations
- Derivations from theory: Mooney equation
- Non- Gaussian Chain Statistics and Network Theory
- Thermodynamic Analysis of Gaussian Network etc
Unit 6 Swelling Phenomena
- General Thermodynamic Principles
- Significance of thermodynamic quantities
- Statistical treatment of Swelling
- The Swelling of Cross-linked polymers
- Relation between swelling and modulus
- The Cohesive-energy density
- The dependence of swelling on strain
- Swelling under torsional strain, etc
Unit 7 Cross linking and Modulus
- The experiments of Moore and Watson and of Mullins
- Effect of entanglements etc
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