Transcription of Materials and their Flow Properties
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Materials and their Flow Properties
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 thermoplastic is a plastic material that will soften (melt) on heating and harden on cooling. This softening (or melting) by heat and hardening by cooling can be repeated. This allows thermoplastic materials to be recycled. Synthetic Polymers Most commercial polymers and rubbers/elastomers are composed of molecules based on the element
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