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Física- Plástico


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Esta es una presentación sobre el "plástico". Trata sus beneficios, ventajas y desventajas, como también su uso y tipos.

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Física- Plástico

  2. 2. Definition of plastic<br />The term “plastic” is referred to a group of synthetic or semi-synthetic organic condensation products that can be molded into objects, films, or fibers. The name is derived from the fact the in its semi-liquid state it has the property of plasticity (it is malleable). <br />Important is to say that:<br />Plastics vary greatly in heat tolerance, hardness, and resiliency. It makes them adaptable and their general uniformity of composition and lightness guarantee their use in almost all industries. <br /><ul><li> Plastic may also refer to any material whose characteristics are: deformation or failure under shear stress.</li></li></ul><li>Chemical compound<br /><ul><li>The majority of plastics are composed of polymers of carbon (d. chain of hydrocarbon molecules), and hydrogen alone or with oxygen, nitrogen, chlorine or sulfur in the backbone. </li></li></ul><li>Uses of plastic<br />Plastics can be used in several ways. Its various and different uses have become essential for everyday life. In their uses are included:<br /><ul><li> For building construction, electronics, packaging, transportation industry.
  3. 3. They are used to make water bottles, pens, plastic bags, cups.
  4. 4. They are used to make another product. (e.)
  5. 5. Plastics are used to reduce soil and wind erosion.</li></li></ul><li>Uses of plastic<br />There are about 50 different types of plastic, each one with different uses and properties.The most common types of plastic are:<br /><ul><li>Polyethylene terephthalate (PET):for fizzy drink bottles
  6. 6. High-density polyethylene (HDPE): Bottles for milk and washing-up liquids.
  7. 7. Polyvinyl chloride(PVC) - Food trays, cling film, bottles for squash, mineral water and shampoo
  8. 8. Low density polyethylene(LDPE) - Carrier bags and bin liners.
  9. 9. Polypropylene(PP) - Margarine tubs, microwaveable meal trays.
  10. 10. Polystyrene(PS) - Yoghurt pots, foam meat or fish trays, hamburger boxes and egg cartons, vending cups, plastic cutlery, protective packaging for electronic goods and toys.
  11. 11. Other types of plastic include: Elastomer, epoxy resin, polycarbonate, copolymer, phenolic, etc.</li></li></ul><li>advantages<br /><ul><li> Plastics are light in weight.
  12. 12. They can be easily molded; have excellent finishing.
  13. 13. They have very good strength and toughness.
  14. 14. Possess well shock absorption capacity.
  15. 15. Plastics have corrosion resistant and they are chemically inert.
  16. 16. Posses good thermal energy and electrical insulating property.
  17. 17. Have a recycling process which make them not decompose. (e. plastics bottles)
  18. 18. They are one of the unbreakable materials
  19. 19. Plastic is odorless.</li></li></ul><li>disadvantages<br /><ul><li>Plastics are nonrenewable resources.
  20. 20. Is a soft material.
  21. 21. It can have embrittlement at low temperatures.
  22. 22. They Are deformation under load.
  23. 23. They have low heat resistant and poor ductility.
  24. 24. Plastic are combustible.
  25. 25. Recycle process can be very costly.</li></li></ul><li>IMPORTANCE OF PLASTIC<br />Originally, plastics were discovered and then developed based on trial and error method. The present time is sometime referred as plastic age, because the use of polymeric material is in large variety of applications. This rapid growth has taken place only in the last 50 years. Plastics will always be an essential material in life, not just for industries but for everyone in anyplace who can possibly need it.<br /><ul><li>When you think of plastic, always have in mind these three words: durability, strength and chemical resistance. </li></li></ul><li>THANKS<br />GOD BLESS YOU<br />