1 / 29

Amorphous and Semi-Crystalline Engineering Thermoplastics Materials, properties and applications.

Amorphous and Semi-Crystalline Engineering Thermoplastics Materials, properties and applications. Prepared by the IAPD Education Committee (Module 4) Presented courtesy of Modern Plastics Inc. Amorphous Engineering Thermoplastics Key Characteristics.

salena
Download Presentation

Amorphous and Semi-Crystalline Engineering Thermoplastics Materials, properties and applications.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Amorphous and Semi-Crystalline Engineering Thermoplastics Materials, properties and applications. Prepared by the IAPD Education Committee (Module 4) Presented courtesy of Modern Plastics Inc. The IAPD Plastics Primer, Module 4

  2. The IAPD Plastics Primer, Module 4

  3. Amorphous Engineering ThermoplasticsKey Characteristics • Moderate cost, strength and temperature resistance • Good impact resistance • Translucency • Good dimensional stability • Excellent optical qualities The IAPD Plastics Primer, Module 4

  4. Amorphous Engineering ThermoplasticsMaterials • Polycarbonate (PC) • Polyphenylene Oxide (PPO) • Polyphenelyne Ether (PPE) • Thermoplastic Urethane (TPU) The IAPD Plastics Primer, Module 4

  5. Polycarbonate (PC)Strengths • Excellent clarity • Excellent toughness • Good heat resistance • Excellent electrical properties • Intrinsic flame-retardancy • Excellent strength The IAPD Plastics Primer, Module 4

  6. Polycarbonate (PC)Limitations • Continual exposure to hot water causes gradual embitterment • Most aromatic solvents, esters and ketones can cause crazing and cracking The IAPD Plastics Primer, Module 4

  7. Polycarbonate (PC)Applications • Vandal resistant windows • Machine guards • Outdoor signs • Sky lights • Backboards • Bike, roller blading protective wear The IAPD Plastics Primer, Module 4

  8. Modified Polyphenylene Oxide (Mod PPO) Modified Polyphenylene Ether (Mod PPE) Key Characteristics • High dielectric strength • Available in FDA compliant grades • Less expensive than polycarbonate (PC) • Good chemical resistance to strong acids, bases and water • Wide range of processing • Good creep resistance The IAPD Plastics Primer, Module 4

  9. Modified Polyphenylene Oxide (Mod PPO) Modified Polyphenylene Ether (Mod PPE) Applications • Electrical housings in appliance, computers, business equipment, etc. • Water purification equipment parts • Insulators • Gears The IAPD Plastics Primer, Module 4

  10. Thermoplastic Polyurethane (TPU)Key Characteristics • Wide range of service temperatures • Wide range of harness options • Excellent tear resistance • Excellent compression strength • Excellent resistance to non polar solvents • Excellent electrical properties • Excellent abrasion resistance • High tensile strength The IAPD Plastics Primer, Module 4

  11. Thermoplastic Polyurethane (TPU)Applications • Impact resistant housings • Valves • Water filter caps • Geophysical cable spacer The IAPD Plastics Primer, Module 4

  12. Semi-Crystalline Engineering ThermoplasticsKey Characteristics • Moderate cost, strength • Moderate temperature resistance • Good chemical resistance • Good bearing and wear properties • Low COF • Difficult to bond The IAPD Plastics Primer, Module 4

  13. Semi-Crystalline Engineering ThermoplasticsMaterials • Polyamide (PA) — Nylon • Polyoxymethylene (POM) — Acetal • Polyethylene terephthalate (PET) • Polybutylene terephthalate (PBT) • Ultra high molecular weight polyethylene (UHMW-PE) The IAPD Plastics Primer, Module 4

  14. Nylon (PA)Strengths • Good strength • Good toughness • Fair heat resistance • Good chemical resistance • Low COF The IAPD Plastics Primer, Module 4

  15. Strong acidic environments Areas where moisture absorption is of concern Areas experiencing high operating temperatures Nylon (PA)Limitations The IAPD Plastics Primer, Module 4

  16. Film Automotive Electrical/electronics Consumer goods Nylon (PA) Applications The IAPD Plastics Primer, Module 4

  17. Cast PA vs. Extruded PA • Extruded nylon can be produced in almost any grade • Cast nylon grades are limited to Type 6, Type 6 1/2 and some Type 12 • Generally Nylon 6/6 and Nylon 6 (cast or extruded) are interchangeable in most applications (physical property differences are minor) • Nylon 6/6 is stronger and stiffer than Nylon 6, and has more resistance to compression • Nylon 6 has better elongation values than Nylon 6/6, providing better ductility • Cast Nylon can be produced in large profiles and custom shapes, and is generally less expensive than extruded grades The IAPD Plastics Primer, Module 4

  18. Acetal (POM)Strengths • Good dimensional stability • Good wear resistance • Excellent strength • Excellent stiffness • Good rigidity • Low moisture absorption • Low COF The IAPD Plastics Primer, Module 4

  19. Acetal (POM)Limitations • Centerline porosity in copolymers • Using copolymer in hot water environments (boiling/steam) • Strong acidic environments • Strong alkali environments • Areas experiencing high operating temperatures The IAPD Plastics Primer, Module 4

  20. Bearings Bushings Valve seats Washers Nozzles Spools Cams Acetal (POM)Applications The IAPD Plastics Primer, Module 4

  21. Thermoplastic PolyestersKey Characteristics • Good range of mechanical properties • Good dimensional stability • Superior chemical resistance • Good electrical properties The IAPD Plastics Primer, Module 4

  22. Thermoplastic Polyesters Materials • Polyethylene terephthalate (PET) • Polybutylene terephthalate (PBT) The IAPD Plastics Primer, Module 4

  23. Polyethylene Terephthalate (PET)Polybutylene Terephthalate (PBT)Key Characteristics • High dimensional stability under heat • High stiffness and hardness • Good bearing strength • Good electrical properties • Good resistance to chemicals • Good stress-cracking resistance • Excellent flow characteristics The IAPD Plastics Primer, Module 4

  24. Pump components Automotive components Food packaging components Insulators Thermoplastic PolyestersApplications The IAPD Plastics Primer, Module 4

  25. Thermoplastic PolyestersCaution! Watch high temperature environments! Use caution when recommending thermoplastic polyesters in applications requiring high temperature resistance, above 93-121oC/200-250oF. The IAPD Plastics Primer, Module 4

  26. Ultra High Molecular Weight PE (UHMW-PE)Strengths • Highest abrasion resistance and impact strength of any plastic • Very low COF • Excellent cryogenic (low temperature) material • Self-lubricating • FDA/USDA compliant The IAPD Plastics Primer, Module 4

  27. Ultra High Molecular Weight PE (UHMW-PE)Limitations • Only good until 82oC/180oF • Not a self-supporting material • High cost for tooling for custom extrusion and custom parts The IAPD Plastics Primer, Module 4

  28. Ultra High Molecular Weight PE (UHMW-PE)Applications • Guides • Wear strips • Liners The IAPD Plastics Primer, Module 4

  29. The IAPD Plastics Primer, Module 4

More Related