Prof. Dr. Abdullah Khan Durrani - PowerPoint PPT Presentation

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Prof. Dr. Abdullah Khan Durrani
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Prof. Dr. Abdullah Khan Durrani

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  1. Prof. Dr. Abdullah Khan Durrani

  2. Polymers Abbreviations

  3. POLYMERS Categories of Polymers THERMOPLASTICS THERMOSETS ELASTOMERS

  4. Thermoplastics Acetals polyesters acrylics polyethylenes abs polyimides cellulosics polypropylenes fluorocarbons polystyrenes polyamides polysulfones polycarbonates Polyvinyl chloride

  5. Thermosets alkyds phenolics aminos polyesters urea polyimides epoxies silicones

  6. ELASTOMERS rubbers silicones polyurethane

  7. Effect of Temperature on Solids

  8. Effect Of Temperature

  9. Temperature effect on Polymers

  10. Tg / Tm for Polymers

  11. Thermo Plastics

  12. Thermo Settings

  13. Elastomers

  14. Plastics 1- On behalf of processing 2-On behalf of Mechanical Properties 3- On behalf of other Properties

  15. Additives for Processing

  16. For Mechanical and Other Properties

  17. Shaping the Polymer

  18. Methods for plastic processing

  19. Additives for plastics

  20. Additives Additives (also known as modifiers) are substances added to a material usually to improve its properties, but they can also be used as extenders to reduce cost. Although some additives provide a broad use and are applicable to many plastics, others may be used exclusively for only one or two plastics; for example plasticizers are generally developed for specific plastics.

  21. Additives were originally used in plastic compounding to overcome limitations of the base resin. For example, they provided more effective flame resistance or improved flexibility. Gradually, the uses of additives and modifiers were extended to provide advantages in processing of the materials (e.g., lubricants and slip agents).More recently, the uses of additives and modifiers have been extended even further to provide completely new types of materials with properties much different from those of the base resin. Examples of this are blowing agents that can be used to pro-duce foamed plastic products and adhesion promoters that can be used to improve adhesion to internal reinforcement materials.

  22. plastic additives are generally classified by their function rather than by chemistry. The following is just a short list of additives based on the functions they can provide in polymeric formulations: adhesion promoters, antiblocking agents, antifogging agents, antioxidants, antistatic agents, biocides, blowing agents, coupling agents, de foamers (or air release agents), flame retardants, heat stabilizers, impact modifiers, low-profile additives, lubricants, plasticizers, slip agents, thickeners, UV stabilizers, and wetting agents.

  23. ADDITIVES EXAMPLES

  24. Blending/compounding

  25. Rotational Moulding

  26. Casting/Compression

  27. Injection

  28. Calendering and extrusion

  29. Extrusion

  30. Film blowing

  31. Bottle blowing

  32. Vacuum /deep drawing molding