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Chemistry > 4 Synthetic polymers > Flashcards

4 Synthetic polymers Flashcards

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1
Q

What is polymerisation?

A

It is the joining up of lots of little molecules (monomers) to make one big molecule (polymer).

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2
Q

What is addition polymerisation?

A

It is when molecules simple add onto each other without anything else being formed.

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3
Q

What is used to start the process of polymerisation?

A

Heat and high pressures and an initiator.

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4
Q

How are monomers presented?

A
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5
Q

How are repeating units (for polymers) presented?

A
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6
Q

How do you draw the polymer when given a monomer?

A

Break C = C bonds

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7
Q

How do you draw the monomer when given the polymer?

A

Add C = C bonds.

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8
Q

How can you draw the repeating unit of poly(ethene)?

A
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9
Q

How do you draw the repeating unit of poly(propene)?

A
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10
Q

How do you draw the repeating unit of poly(chloroethene)?

A
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11
Q

How do you draw the repeating unit of poly(tetrafluoroethene)?

A
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12
Q

What is non-biodegradeable?

A

They cannot be broken down by bacteria in the environment.

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13
Q

What are two ways of disposing addition polymers?

A
  • Landfill
  • Incineration
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14
Q

What is landfill?

A

Bury the polymers in landfill sites

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15
Q

What are some advantages of landfill?

A
  • No greenhouse gases or toxic gases produced from plastics.
  • Cheap.
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16
Q

What are some disadvantages of landfill?

A
  • Ugly, smelly and noisy; no one wants to live next to a landfill site.
  • Uses large areas of land.
  • The waste will be there for thousands of years.
17
Q

What is incineration?

A

Burning plastics in order to tackle the problem of disposal.

18
Q

What are some advantages of incineration?

A
  • Requires little space.
  • Can produce heat for local homes/offices and/or produce electricity.
19
Q

What are some disadvantages of incineration?

A
  • It is expensive to build and maintain the plant.
  • Produces greenhouse gases.
  • Releases toxic gases.
  • The ash produced must be disposed of in landfill sites.

Chemistry (22 decks)

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