The subject is designed to enable the students to acquire basic knowledge of polymers, their advantages, application, classification and conversion. This will help the students in identifying different polymeric materials to be processed in the industry and determine their quality based on physical and chemical properties.
1. Introduction to Polymers (6 hrs)
Classification of polymers: Natural, Semisynthetic, Synthetic, Linear, Branched, Cross linked polymers, Thermoplastic, Thermoset, Commodity, Engineering, Speciality, Condensation, Addition, Polymer blends and alloys, Plastics, Elastomers, Fibers.
2. Brief history of Polymer Engineering. Scope of Polymer Engineering and Comparison with Conventional Materials (Metal, Wood etc.).Study of Polymers in new emerging areas like membrane separations, conducting polymers and biomedical applications. (4 hrs)
3. Degree of polymerization, molecular weight and molecular weight distribution, polydispersity, measurement of molecular weight by dilute solution, viscometry, membrane osmometry, vapourphase osmometry, cryoscopy, ebulliometry, light scattering, centrifugation, Gel. permeation chromatography.
4. Physical states of polymers – amorphous and crystalline behaviour. Polymer dissolution – dissolution and solvent selection for polymers, thermodynamics of polymer solutions, solubility parameter (4 hrs)
5. Thermal transmissions in polymer – Glass transition temperature, its importance and the factors which influence it, techniques for its determination, melting temperature, relationship of polymer properties with structure (4 hrs)
6. Concept of functionality and Carother’s equation for condensation, polymerization, relation between conversion and degree of polymerization, gel phenomenon. Macromolecular concept, secondary bonding in polymers, stereo isomerism in polymers. (6 hrs)
7. Free radical polymerization, different types of initiators, inhibition, retardation, chain transfer agents etc. Auto-acceleration, ceiling temperature, ionic polymerization. Ziegler-Natta polymerization (10 hrs)
8. Techniques of polymerization: bulk, solution, emulsion and suspension, their relative advantages and disadvantages, introduction to Rheology and Visco-elasticity, time dependent and time independent viscosity behaviour; power law fluids; Zero sheer viscosity, Maxwelll and Voigt models of visco-elastic materials
Industrial visit or a laboratory scale polymerization should be shown to the students.