Polymers are organic macromolecules formed by the union of monomers through polymerization. There are natural polymers like polyethylene and synthetic polymers like polyvinyl chloride. The document discusses several common polymers - low-density polyethylene, high-density polyethylene, polypropylene, polyethylene terephthalate, polyvinyl chloride, and polystyrene - outlining their properties and applications. Key uses include plastic bags, bottles, films, construction materials, and more. The document also includes questions and answers about polymer characteristics and specific polymers.

1. POLYMERS JuanjoArbona Maria Clérigues Daniela Hurtado Aitor Marquez Maria Medina Daniel Rodriguez

2. Whatisapolymer? Polymers are organic macromolecules formed by the union of monomers in a chemical process called polymerization.

3. Typesofpolymers There are natural and synthetic polymers

4. LOW-DENSITY POLYETHYLENE: Low density polyethylene is an "addition polymer", formed by repeating units of ethylene.

6. Good impact resistance.

7. It can be transparent, depending on its thickness.

8. It can be processed by the methods used for forming thermoplastics.

9. It is more flexible than HDPE.

11. Film for greenhouses and other agricultural uses.

12. Toys.

13. Household items : cups, plates, cutlery ...

14. Bottles.

15. Stretch film to pack pallets.

18. More tensile strength than low-density polyethylene.

19. It is harder and more opaque than low-density polyethylene.

20. Can withstand higher temperatures.

22. Portable basketball system bases.

23. Bottle caps.

24. Breast implants.

25. Telecom ducts.

28. High softening temperature

29. High resistance to stress cracking

30. Great tendency to be oxidized (problem usually solved by the addition of antioxidants)

32. Blow molding hollow containers: bottles, fuel tanks…

33. Thermoformed food containers for applications that require resistance to high temperatures (microwave) or low temperature (frozen).

34. Fiber production

35. Extrusion profiles, sheets and tubes

36. film production

40. Rigid cans

41. Industrial fiber: ropes, fabrics…

42. Films for food packaging

45. Ductile and tenacious.

46. High resistance to abrasion.

47. Stable and inert.

48. It can last up more than sixty years.

50. Water bottles

51. Films : candy, foods…

52. Jars: food, cosmetics…

53. Blisters: drugs, sundries…

54. Parts of electrical appliances

55. Plugs

58. It hasn’t got resistance to the temperature.

59. The polystyrene has very low electrical conductivity.

61. It is in use like insulating thermal and acoustic.

62. It uses as thermal isolation in soils

64. High molecular weight

65. Changeable shape2. We know that an element is organic because it is formed by carbon.

67. Low-density polyethylene is more flexible than high-density polyethyleneTHERE ARE MORE THAN THOSE POSSIBILITIES 5. High-density polyethylene is made by petroleum.

69. 10. Polyvinyl chloride is derived from sodium chloride and petroleum. 11. Write some principal uses of the polyvinyl chloride are: Construction, Films, Jars, Blisters, Plugs… 12. Which are the four types of polystyrene? PS crystal, Polystyrene of high place in the environment, Expanded polystyrene and Polystyrene extrudate. 13. Some properties of polystyrene are… (Choose the correct answers). a)It can float in the water d) It hasn’t got resistance to high temperatures