The document provides an overview of plastic materials, their properties, classifications, and applications. It discusses the different types of plastics including thermoplastics, thermosets, crystalline and amorphous polymers. Common plastic materials like polyethylene, polypropylene, nylon and their properties are described. Factors to consider for plastic material selection like mechanical requirements, chemical environment, processing methods and part design are also summarized.

2. Why Plastics??? - Polymers which are very resistant to chemicals. - Polymers which are thermal and electrical insulators. - Generally, polymers which are light in weight - with varying degrees of strength. - Polymers that can be processed in various ways to produce thin and very intricate parts. Plastic Materials The origin of the word "plastics" comes from Greek. Meaning “to form”

3. PLASTICS PLASTICS PLASTICS !!! THAT IS WHAT WE HEAR . WHY IS IT SO ??? WEIGHT OF PACKING ENERGY CONSUMPTION WASTE VOLUME 100% +391% +208% +258% WITH PLASTIC MATERIAL WITHOUT PLASTIC MATERIAL Plastic Materials Comparison of plastics as packaging materials

4. PLASTICS ARE A MERE 4% OF THE USES OF OIL FUELS OTHERS PETROCHEMICALS PLASTICS MISC. 7% 86% 7% 4% 3% Plastic Materials 100Kg Of plastics in a motor car replaces 200 to 300 Kg Of traditional material

5. Use of Plastics in Western Europe Plastic Materials The consumption of energy reduced by 50% in appliances from past 20 years

6. Plastics 8% Paper/Cardboard27% Miscellaneous 17% Metals 5% Glass 9% Organic Material 34% Household waste in western Europe (129 million tons/year) 72% 3% 16.8% 8.2% Plastic Materials Recycling is the major advantage in plastics to reduce the waste

8. • Organic polymeric materials . • Mostly Petrochemical based. • Polymer : Made of many units. – Generally a few thousand to a few million in one molecule. Plastic Materials

9. Classification of plastic materials Thermoplastics are resins that repeatedly soften when heated and hardened when cooled. Nylon, Acrylic, Acetal, Polystyrene, Polyvinyl chloride, Polyethylene, Cellulose acetate are some examples. Thermoplastic elastomers known as highly elastic and flexible resins. Thermosets(cross-linked plastics) Initially a liquid or a semisolid or a powder, which solidify on heating for first time, and then will only decompose on heating to a high temperature. Phenolic, Amino, Epoxy, Polyurethane are few examples. Vulcanization is process to convert from rubbers to thermoset plastics. Thermoplastics materials are major contribution to engg. applications

11. This is what happens to thermoplastics and thermosets, when we process them. Classification of plastic materials

12. Classification of plastic materials

13. Classification of plastic materials

15. Classification of thermoplastics

16. Classification of thermoplastics

17. Classification of thermoplastics

18. Classification of thermoplastics

19. Relative polymer properties Liquid crystalline materials are best...

24. Plastic Material Abbreviation

26. Commonly used plastics and properties