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Chemistry Mod 7 > Ploymers > Flashcards

Ploymers Flashcards

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1
Q

what is addition polymerisation?

A

molecules don’t loose anything; bonds break and join

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2
Q

what is the monomer for polyethylene

A

ethene

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3
Q

what is low density polyethylene

A

lots of branching

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4
Q

properties of low density polyethylene

A

chemically unreactive
electrical insulator
transparent + flexible

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5
Q

example of low density polyethylene

A

shopping bag

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6
Q

what is high density polyethylene

A

linear and tightly packed

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7
Q

properties of high density polyethylene

A

chemically unreactive
electrical insulator
rigid
higher melting point

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8
Q

example of high density polyethylene

A

pipes

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9
Q

what is the monomer for polyvinyl chloride

A

chloroethene

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10
Q

properties of polyvinyl chloride

A

rigid
brittle

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11
Q

example of polyvinyl chloride

A

bank cards

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12
Q

why is polyvinyl chloride more rigid and brittle

A

Cl atoms are large creating stronger intermolecular forces

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13
Q

what is the monomer for polystyrene

A

ethenylbenzene

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14
Q

properties of crystal polystyrene

A

rigid
transparent

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15
Q

use of crystal polystyrene

A

plastic cups

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16
Q

properties of expanded polystyrene

A

heat + sound insulation
opaque
light

17
Q

example of expanded polystyrene

A

styrofoam cups

18
Q

what is the different between crystal and expanded polystyrene

A

expanded polystyrene has N2 gas pockets

19
Q

what is the monomer for polytetrafluroethene

A

tetrafluroethene

20
Q

properties of polytetrefluroethene

A

rigid
heat resistant
non-stick

21
Q

example of polytetrafluroethene

A

non-stick frypans

22
Q

what is condensation polymerisation

A

condensation with water / ammonia by-poduct

23
Q

what do monomers of condensation polymers usually look like

A

has a functional group on each side

24
Q

functional groups of Nylon-6,6

A

carboxylic acid + amine

25
Q

properties of Nylon-6,6

A

rigid
doesn’t stretch
resistant to heat degradation

26
Q

use of Nylon-6,6

A

firefighter uniforms

27
Q

what is an example of a condensation polyester

A

polyethyleneterephthalate

28
Q

functional groups of polyethyleneterephthalate monomers

A
  1. alcohol
  2. carboxylic acid with benzene ring in middle
29
Q

properties of polyethyleneterephthalate

A

colourless
water resistant
high melting point

30
Q

use of polyethyleneterephthalate

A

plastic bottles

31
Q
A

Chemistry Mod 7 (4 decks)

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