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Flashcards in Polymers Deck (15)
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1

Addition polymerisation

Made up of thousand of repeat units of monomers
Unsaturated alkenes, form long alkane chains
High molecular mass
Prefixed by poly
Heat and pressure

2

Polythene

Ethane monomers
Supermarket bags, shampoo bottles, toys

3

Polychloroethene

Polyvinylchloride
Pipes, films, sheeting, insulation and cable sheathing

4

Polypropene

Children’s toys, packing crates, rope fibre

5

Polyphenylethene/ polystyrene

Packing supplies, food trays, cups, thermal insulating properties

6

Tetrafluoroethane

Teflon pans
Clothing
Shoes

7

Identify monomers from polymer chains

Identify repeat unit, change single C to double C

8

Disposal of waste polymers

Lack of reactivity, non biodegradable
Kills marine life

9

Recycling

Reduces environmental impact, conserve fossil fuels, decrease landfill
Polymers organised by type
Chopped into flakes, washed, dried, melted
Pellets make new products

10

PVC recycling

Hazardous, high chlorine, additives in polymer
When burnt, HCl gas released, other pollutants released
Solvents can dissolve PVC, recovered by precipitation from solvent, reused

11

Waste polymers as fuel

Derived from petroleum/ natural gas, high energy content
Incinerated, producing heat, generate steam to drive turbines. Produce electricity

12

Feedstock recycling

Chemical, thermal process that reclaims monomers, gas, oil from waste polymers
Raw materials produce new polymers
Can handle unsorted, unwashed polymers

13

Bio plastics

Produced from plant starch, cellulose, plant oil, proteins
Protects environment, conserve oil reserves

14

Biodegradable polymers

Broken down by microorganisms into water, CO2, other compounds
Made from starch, cellulose, additives that alter polymer structure
Compostable polymers degrade
Based on polylactic acid
Starch bin liners can be composted with waste

15

Photodegradable polymers

Oil based polymer
Has bonds, weakened by absorption of light to start degradation
Light absorbing additives sometimes used