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Exploring Plastics: Types and Structures Tutorial

Dive into the world of plastics by learning about the different types and structures, including thermoplasts, reactoplasts, and elastomers. Understand their properties and applications in various industries.

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Exploring Plastics: Types and Structures Tutorial

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  1. Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“ Tutorial: Strojírenská technologie Topic: Plasty – Plastics – types and structures Prepared by: Ing. Elena Nová Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

  2. Plastics – types and structures

  3. Plastics – types and structures • Plastics are divided according to their inner structure into three groups: • Thermoplasts • Reactoplasts • Elastomers

  4. Plastics – types and structures • Thermoplasts can be heat formed and welded • Thermoplasts become softer at higher temperatures and again harder at lower temperatures.Injection moulding:

  5. Plastics – types and structures • Most known thermoplasts: • Polystyren(PS). • Polyethylen (PE). • Polyamid (PA - nylon, silon). • Polyethylentereftalát (PETP - PET). • Polytetrafluorethylen (PTFE - teflon). • Polyvinylchlorid (PVC - novodur, novoplast). • Polymetylmetakrylát (PMMA - plexisklo).

  6. Plastics – types and structures • Polystyren

  7. Plastics – types and structures • Reaktoplasts cannot be formed or welded at higher temperatures. • After hardening they cannot be heat-formed. Most known thermosets: • Bakelite. • Rubber. • Epoxide, resin.

  8. Plastics – types and structures • Elastomer, Rubbers, - are elastic but cannot be formed or welded at higher temperatures. • Most known elastomers and elastic fibers: • Elastin's - polymers based on polyurethane Elastodiens - based on polyisopreens of rubber.

  9. Plastics – types and structures • Usage of plastics: • Textile fibers, strings, loop piles, foils • Plates, pipes, profiles, blocks • Pressing andinjection matters • Technical resins • Lightened materials

  10. Decide: • Can they be formed at higher temperature • Cannot be formed or welded at higher temperature • Are they elastic, but cannot be formed or welded at higher temperature • Reaktoplasty • Elastomery • Termoplasty

  11. Translate vnitřní struktury pevnost tvrdý měkký tekutý rozpad teplota

  12. Used literature • http://ok1zed.sweb.cz/s/01-machine-tech/plast.htm • http://www.ksp.tul.cz/cz/kpt/obsah/vyuka/skripta_tkp/sekce_plasty/01.htm

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