METE 453  POLYMER MATERIALS

REFERENCE BOOKS :

1. Osswald & Menges, Materials Science of Polymers for Engineers, Hanser, all editions

2. McCrum, Bucley, Bucknall , Principals of Polymer Engineering, all editions

3.   Powell & Housz , Engineering With Polymers, Stanley Thornes Pubs., all editions

4. Ward & Hadley, An Introduction to The Mechanical Properties of Solid Polymers, Wiley, all editions

5. Williams , Fracture Mechanics of Polymers , Ellis Harwood , all editions

COURSE CONTENT :

1. POLYMER SCIENCE FOR ENGINEERS (Lecture Notes) (1 week)

· Introduction to Polymers, Types of Polymers, Chemical Structure of Polymers, Names of Polymers

2. STRUCTURE OF POLYMERS (Lecture Notes & Ch-2 ) (1.5 week)

· Linear vs Network Structure, Structure of Thermoplastics, Partial Crystallinity Models

· Molecular Mobility, Molecular Orientation, Structure of Thermosets and Rubbers, Parts of Polymer Structure

3. PROPERTIES AND APPLICATIONS OF POLYMERS (Lecture Notes & Ch-3.3) (1 week)

· An Overview of Thermal, Mechanical, Chemical, Electrical and Optical Properties of Polymers

· Applications of Thermoplastics, Thermosets and Rubbers

4. PROCESSING OF POLYMERS (Lecture Notes & Ch-3.3, 4.1, 4.3, 4.4) (1.5 week)

· Preliminary Steps: Polymerization, Additives and Compounding

· Three Main Steps: Mixing, Shaping and Stabilizing

· Continuous Processes: Extrusion, Calendaring,

· Discrete Processes: Injection Moulding, Reaction Injection Moulding, Compression Moulding, Transfer Moulding, Blow Moulding, Thermoforming, Rotational Moulding, Polymer Casting

5. STIFFNESS OF POLYMERS (Ch-5.1 ) (1 week)

· Elastic Modules of Polymers, Effect of Composition on Modulus,

· Long-term Loading, Stress Relaxation and Creep

6. STRENGTH OF POLYMERS (Ch-6.2.1 , 6.2.2) (2 weeks)

· Short-term Strength, Brittle and Ductile Failure, Effects of Loading Rate and Temperature

· Failure Under Long-term Loading, Constant Loading, Cyclic Fatigue Loading

7. FATIGUE AND FRACTURE OF POLYMERS (Lecture Notes & Ch-6.3) (2 weeks)

· Thermal and Mechanical Fatigue, Factors Influencing Fatigue of Polymers

· Energy and Stress Intensity Approach to Fracture, Fracture Toughness

· Time Dependence of Fracture, Crack Growth Under Constant and Cyclic Load

8. DUCTILE – BRITTLE TRANSITION IN POLYMERS (Ch-6.2.3 , 6.3.5) (2 weeks)

· Factors Leading to Ductile-Brittle Transition in Polymers:

· Loading, Stress Concentration, Crack Depth, Thickness, Structure, Compounding, Processing, Environmental Factors, Environmental Stress Cracking

9. INTERACTIONS BETWEEN PROCESSING AND PROPERTIES (Ch-9.2 , 9.3) (1 week)

· Thermal Effects: Residual Stresses, Shrinkage, Dimensional Effects, Inhomogeneity, Crystallization

· Flow Effects: Molecular Orientation, Short Fiber Orientation, Weld Lines, Sharkskin, Die Swell

10.DESIGNING WITH POLYMERS (Ch-6.2.4 , Ch-10) (1 week)

· Designing to Avoid Failure in Polymers:

· Stress and Environmental Analyses, Selection of Strength Data and Safety Factor, Design Equation

· Product Design with Polymers

TERM-PROJECT : A special topic on the use of Engineering Polymers will be assigned for 1-2 students