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F5 chemistry > C4: Polymer > Flashcards

C4: Polymer Flashcards

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1
Q

what is polymer

A

polymer is a long chain molecule that is made up from a combination of many repeating basic units

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2
Q

what is monomer of natural rubber

A

isoprene

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3
Q

thermoplastic

A
  • can be remoulded repeatedly upon heating
  • can be recycled
  • melt when heated, solidify when cooled
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4
Q

exp of thermoplastic

A
  • polystyrene
  • polyvinyl chloride (PVC)
  • nylon
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5
Q

thermoset

A
  • cannot be remoulded after heating
  • normally disintegrate or burn upon heating
  • cannot be recyled
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6
Q

exp of thermoset

A
  • melamine

- bakelite

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7
Q

elastomer

A
  • high elasticity

- can be stretched and return to its original shape when released

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8
Q

exp of elastomer

A
  • polyurethene

- styrene-butadiene rubber (SBR)

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9
Q

characteristic of polystyrene

A
  • light and heat insulator
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10
Q

characteristic and uses of polypropene

A
  • durable

- toys and textile

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11
Q

characteristic and uses of polyethene

A
  • strong and durable

- plastic bag and bottle

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12
Q

characteristic and uses of polychloroethene

A
  • polyvinyl chloride (PVC)
  • strong and hard
  • water pipes
  • electrical insulator
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13
Q

condensation polymerisation reaction to produce terylene

A

1,2-ethanediol + terephthalic acid

–> terylene + water

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14
Q

condensation polymerisation reaction to produce nylon

A

1,6-haxanediamine + decanedioyl dichloride

–> nylon _+ hydrochloride

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15
Q

characteristics of neoprene

A
  • polychloroprene
  • high heat resistance
  • oxidation resistance
  • flame resistance
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16
Q

uses of neoprene

A
  • petrol rubber hoses

- gloves

17
Q

characteristics of styrene-butadiene rubber (SBR)

A
  • abrasion resistance

- high heat resistance

18
Q

uses of SBR

A
  • tyres
  • shoe soles
  • coated fabrics
19
Q

characteristic of silicone rubber

A
  • high temperature resistance

- inert

20
Q

uses of silicone rubber

A
  • medical implants
  • cooking utensils
  • automotive components
21
Q

what synthetic rubber are oil and solvent resistence

A
  • thiokol

- nitrile rubber

22
Q

3 alternative vulcanisation methods

A
  • metal oxide
  • radiation (gamma ray)
  • peroxide (hydrogen)

F5 chemistry (1 decks)

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