PA4001 Rheology in Polymer Processing Syllabus:
PA4001 Rheology in Polymer Processing Syllabus – Anna University PG Syllabus Regulation 2021
COURSE OBJECTIVES:
To understand the conformational property of polymer chain using different models.
To study the chain conformation in polymer solution and melt based on thermodynamics.
To introduce fundamental flow properties and methods used to investigate the flow behaviour under stress.
To understand the flow behaviour in different processing methods.
To understand the concept of melt rheology & rheometry
UNIT I MOLECULAR CONFORMATION AND CONFIGURATION
Potential and conformational energy of molecules-polymer conformation and configuration–isomerism in polymers- stereo isomerism, geometrical isomerism, sequential isomerism. Conformation of an ideal chain-mean square end to end distance-freely jointed and freely rotating chain model, worm like chain model, hindered rotation model. Radius of gyration of an ideal chain. Real chain- excluded volume, Flory theory of polymer in a solvent, deforming real and ideal chains.
UNIT II ELASTICITY
Thermo elasticity-Thermodynamics of rubbers–Flory construction- entropic and energetic contributions to the elastic force in rubbers–unentangled rubber elasticity-Affine network model- Phantom network model-entangled rubber elasticity-Edwards tube model-Mooney-Rivlin model
UNIT III SOLUTION PROPERTIES
Polymer solutions-theta condition-Thermodynamic view of miscibility-upper critical solution temperature (UCST)-lower critical solution temperature (LCST)-Concentration regimes in polymer solutions Viscoelasticity-elastic deformation-irrecoverable deformation-models of viscoelasticity-Voigtkelvin-Maxwell-Burger models-WLF equation-TTS curve-Boltzman superposition principle, stress relaxation-creep and creep recovery
UNIT IV FLOW BEHAVIOUR
Basics of rheology- shear stress-shear strain-strain rate-different types of fluids-Newtonian and Non Newtonian fluids- flow behaviour of different Non- Newtonian fluids-zero shear viscosity steady shear and oscillatory shear experiments. Methods to measure flow properties-capillary rheometer-parallel plate rheometer-cone and plate rheometer-Cup and cone viscometer. Measurement of normal stresses. Theories of viscosities of dilute and concentrated Solutions.
UNIT V MELT RHEOLOGY AND RHEOMETRY
Rheology of dilute and concentrated suspensions, Flow behaviour of polymer melts during Injection moulding-Extrusion: Film extrusion, Sheet extrusion and Blow mouldings. Bubble inflation rheometer, compression rheometer, stress relaxation instruments. Torque rheometers, rotational & sliding surface rheometers and their use in determining processability.
TOTAL: 45 PERIODS
COURSE OUTCOMES:
At the end of the course, students will be able to
CO1 Know the conformational change of polymer chains in solution and melt
CO2 Analyze the various thermoelasticity properties & thermodynamics process
CO3 Relate the polymer rheology to properties of polymeric materials and processing
CO4 Understand and measure the basic flow properties of polymers.
CO5 Apply the concept of rheology & rheometry for industrial application.
REFERENCES:
1. Elements of Physical Chemistry: S. Glasstone and D. Lewis, Macmillan India Press, Madras, 1995.
2. Crawford, Roy James, and Patrick J. Martin. Plastics Engineering. Butterworth-Heinemann, 2020.
3. Introduction to Polymer Viscoelasticity: J.J. Alkonis and W.J.Macknight–Willey Inter Science, New York, 1982.
4. Polymer Melt Rheology: F.N.Cogswell, George Goodwin Ltd. and P. R. Londo, John Wiley and Sons, 1981.
5. Polymer physics: Michael Rubinstein and R.H. Colby, Oxford University press ,2003
6. Polymer Physics: Ulf W. Gedde, Chapman & Hall, 1995
7. Rheology of Polymers: G.V.Vinogradov and A.YaMalkin, Mir Pub, Moscow, 1980.
8. Viscoelasticity of Polymers: D.D.Ferry III Edn. John Willey and Sons, New York, 1981.