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Flashcards in Condensation Polymers Deck (26)
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1
Q

What is addition polymerisation

A

Under the right conditions, molecules containing carbon-carbon double bonds can join together and produce very long chains

Part of the double bond is broken and the electrons in it are used to join to a neighbouring molecule.

Describes the situation where many monomers jin together to make a single long polymer chain

2
Q

Give that 3 things that change as a monomer changes into a polymer

A
Monomer = double bond s
Polymer = single bonds

Monomers are individual molecules

Ethene = gas
Polythene = solid
3
Q

When drawing polymerisation always make sure that all carbs are drawn in a single……………………….

A

Horizontal line

4
Q

Give the 3 steps from monomer to polymer when drawn

A

Monomer
Repeat Unit
Polymer

5
Q

What is the repeat unit

A

No double bonds

Jazz hands

6
Q

Draw polyethene

A

```H H
(-C-C-) n
….H..H

7
Q

What is polytetraflouroethene

A

2 carbons with 4 florins coming off instead of hydrogen

8
Q

Give some good things about addition polymers

A

Cheap to make (readily available oil)

Strong compared to their weight

9
Q

Give some problems with addition polymers

A

Inert (unreactive) because they have strong C-C bonds

ard to dispose of since they are not easily broken down by bacteria in the environment

Important that plastics are recycled

10
Q

Give some uses of polyethene

A

Low density
- Thin film (bags)

High Density

  • Plastic bottles
  • Crates
  • Buckets
  • Pipes
11
Q

Give some uses of polypropylene

A

Ropes + cartes

Medical equipment

12
Q

Give some uses of polychloroethene

A

Water pipes

Replacement windows

Don’t conduct electricity so can be used as insulators to coat wires

13
Q

Give some uses for polytetraflouroethene

A

Non stick coating for pots and pans

Very unreactive

14
Q

What is the fictional group of an alcohol

A

-OH

15
Q

What is the fictional group of an acid

A

COOH

Double bond C

16
Q

Ethanol + Propanoic acid =

A

Ethypropanoate + water

17
Q

What are condensation polymers

A

Formed from 2 different monomers which join together alternately.

Where each bind forms, a small molecule such as water or hydrogen chloride is lost

When the two monomers are used as a diol and a dicarboxylic acid a polyester is formed

18
Q

What is a diol

A

An alcohol with two -OH functional groups at each end

19
Q

What is a dicarboxylic acid

A

A carboxylic acid with two -COOH functional groups, one at each end

20
Q

Give the structural formula for Propane-1,3-diol

A

CH2OH, CH2, CH2OH

21
Q

Give the structural formula of hexane-1,6-dioic acid

A

HOOC,CH2,CH2,CH2, CH2, COOH

22
Q

Why does combustion in a car engine produce nitrogen oxide

A

Nitrogen oxide can only be produced at very high temperatures

23
Q

How does the combustion of hydrocarbon fuels result in the formation of sulphur dioxide

A

Fossil fuels contain a small amount of sulphur, when the fuel is burnt the sulphur is released and reacts with oxygen producing it

S + O2 = SO2

24
Q

How is acid rain formed

A

When oxygen and water in the atmosphere react with sulphur dioxide to produce sulphuric acid or with various oxides of Nitrogen to produce nitric acid

25
Q

What does inert mean

A

Very unreactive

26
Q

What are polymers inert

A

Strong covalent bonds