Transcription of Materials and their Flow Properties
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Materials and their Flow Properties 1. Polymers and Plastics 2. 2. Thermopalstic Materials 7. 3. Viscosity and Viscosity Terms 13. 4. Flow Properties Measurement 16. 5. Elastic Effects in Polymer Melts 19. 6. Die Swell 19. 7. Melt Fracture 21. 8. Sharkskin 22. 9. Frozen-In Orientation 23. 10. Draw Down 24. 38 Forge Parkway | Franklin, MA 02038 USA | Tel: +1 (508) 541-9400 | Fax: +1 (508) 541-6206. - 1- Polymers and Plastics A polymer is a chemical compound made up of a large number of identical molecular repeating units. A plastic material is a polymer, generally modified with additives, which is capable of being shaped or molded under reasonable conditions of temperature and pressure. It generally is solid at room temperature and is distinguished from a rubber/elastomer by having a higher stiffness/modulus and a lack of reversible elasticity.
high-density polyethylene (HDPE), polyphenylene sulfide (PPS), and polypropylene (PP). Semi-crystalline polymers are usually malleable, tough, durable, and have a good chemical resistance. Usually they are ... When mixtures are made from two or more polymers (blends or alloys), ISO 1043 suggests that the
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