Material Science

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    • author "me"
    • fileName "Material Science"
    • tags "Final, exam, study, guide, south, mcwright"
    • description "Key topics and vocabualry words to study for the Material Science Final Exam"
    • List the 7 different types of polymer processes:
    • Extrusion
    • Calendering
    • Film Blowing
    • Injection Molding
    • Compression Molding
    • Transfer Molding
    • Blow Molding
  1. Extrusion is....
    A continous process best suited for pairs of constant cross section like pipes, rods, plastic bags and films
  2. Calendering
    This process is an extension of film extrusion
  3. Film Blowing
    This process continously extrudes vertically a ring of semi-molten polymer in an upward direction
  4. Injection Molding
    • A common process for forming plastics
    • Advantages:
    • Rapid processing
    • Little waste
    • Easy automation
  5. Compression Molding
    One of the 1st methods used to form plastics
  6. Transfer Molding
    A modified form of compression molding, used primarily to produce thermosetting plastics

    Molds are expensive
  7. Blow Molding
    A rapid but inexpensive process
  8. What is the most commonly used polymer process?
    Compression molding.
  9. Recycling Code 1
    PET/PETE - Polyethylene Terephthalate

    • Examples:
    • Plastic bottles
  10. Recycling Code 2
    HDPE - High Density Polyethylene

    • Examples:
    • Toys
    • Laundry degergent containers
  11. Recyling Code 3
    PVC - Poly(vinyl) Chloride

    • Examples:
    • Pipes
    • Shower curtains
    • Helmets
  12. Recycling Code 4
    LDPE - Low Density Polythylene

    • Examples:
    • Grocery bagsm
    • Wrapping films
  13. Recycling Code 5
    PP - Polypropylene

    • Examples:
    • Tupperware
  14. Recycling Code 6
    PS - Polystrene

    • Examples:
    • Styrofoam
  15. Recycling Code 7
    PC - Polycarbonate

    • Examples:
    • Comapct disks
    • DVDs
  16. Transparent
    Can be seen through and light can pass through it
  17. Translucent
    Light can pass through it, but can not be seen through
  18. Opaque
    Light cannot pass through and is not see through
  19. Why are composites used?
    "The whole is greater than the sum of parts"

    They are lighter, stiffer, stronger and more heat tolerant than individual materials
  20. Examples of composites:
    • Starched shirts
    • Skateboards
    • Tennis shoes
    • Concrete
    • Plywood
    • Formica
    • Fiberglass
  21. Reinforced Fibers
    Fibers added to a material to increase strength

    Can be continous or discontionous
  22. Continous Fibers
    They run the entire length of the compsite; often used because they are easier to allign
  23. List Types of Forces/Stresses:
    • Tension(pulling)
    • Compression(pushing together/squeezing)
    • Torsion(twisting)
    • Shear(opposite forces not lined up)
  24. Discontinous Fibers
    Dont run the entire length of the composite
  25. List 3 Identification Tests to Identify Polymer Resin:
    • Heat Test
    • Water Test
    • Copper Wire Test
    • Oil Test
  26. What year was the recycle codes created?
  27. Polymers are usually made of...
  28. What type of simple organic compounds come from natural gas, oil and coat?
  29. Hydrocarbons
    Composed exclusively of atoms of carbon and hydrogen
  30. What are two major groups of polymers? Give an example of each.
    Synthetic Polymers-Bakelite

    Natural Polymers-Natural Rubber
  31. Characteristics of Polymers:
    • Low Density
    • Good corrosion resistance
    • Low coefficient of friction
    • Good mouldaiblity
    • Economical
    • Poor temperture resistance
    • Can be produced transparent or in different colors
  32. 3 Anyalytical Identification Tests:
    • Mass spectrometry analysis
    • X-Ray
    • Chemical testing
  33. Polymerization
    The act or process of forming polymers
  34. Vulcanization
    To treat rubber with sulfur and heat, thereby enhancing strength, greater elasticity and durability
  35. Thermosetting
    Made of long chain polymers that cross link with each other after they've been heated

    Relating to a compund that softens when initially heated, but hardens permanently once cooled.
  36. Thermoplastics
    Of or relating to a compund that can be repeatedly made soft and hard through heating and cooling
  37. Organic
    Relating to chemical compunds containing carbon, especially hydrocarbons
  38. Synthetic
    Produced artificially, especially in a laboratory or other man made enviornment
  39. Hydrocarbons
    Any of numerous organi compounds that contain only carbon and hydrogen

    Example: Benzene
  40. Initiator
    A substance that initiates a chemical reaction
  41. Polymer
    Any of carious chemical compounds made of smaller, identical molecules(monomers) linked together
  42. Elastomer
    Any material that is able to resume its original shape when a deforming force is removed
  43. Composite
    Made up of disparte or seperate parts or elements
  44. Nanotechnology
    The science and technology of deivces and materials constructed on extremely small scales(as small as individual atoms or molecules)
  45. Viscosity
    The resisitance of a subtance to flow
  46. Stress
    Force causing a deformation or distortion
  47. Strain
    Change caused by stress
  48. Brittleness
    Having a tendency to break when subject to high stress
  49. Hardness
    The quality or condition of being hard
  50. Elasticity
    The ability to return to original shape or foorm after being subject to strain
  51. Plasticity
    Retains new shape after being deformed by stress
  52. Toughness
    Ability to absorb energy
  53. Strength
    Resistance to distortion by stress or force
  54. Density
    The mass of a substance per unit volume, varies with chane in temperture of a substance
  55. Addition Polymerization
    Polymers formed by many monomers bonding together without loss of any atom or molecule
  56. Condensation Polymerization
    A process by which 2 molecules join together, resulting with the loss of a small molecule(usally water)
  57. Material Safety Data Sheet(MSDS)
    A form with data regarding the properties of a particular substance. Includes instructions for safety and potential hazards
  58. Alkanes
    Contains only single bonds betwenn carbon atoms
  59. Alkenes
    Contain at least 1 double bond
  60. Alkynes
    Contain at least 1 triple bond
  61. Name the protein extraced from milk to make glue:
  62. Crystalline
    Atoms or molecules are only arranged in a regular or repetitive pattern or lattice
  63. Amorphous
    Atoms or molecules are in a random order
  64. What are three ways to classify polymers?
    Thermosets, Thermoplastics and Elastomers
  65. What types of materials are bicycles made out of today?
    Steel/Titanium, Aluminum and Carbon Fiber
Card Set:
Material Science
2012-01-10 01:10:16
mcwright final south material sciene

Key topics and vocabulary words to study for the Final.
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