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Flashcards in Polymers Deck (31)
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1

How to draw a repeating unit for a polyester

Take an H2O from the middle and from the ends

2

2 ways to form a polyester

Di-acid and Di-ol

Or


Di- acyl chloride and Di-ol

3

Polymerisation with a di-acyl chloride and a Di-ol produces what?

HCl and a polyester

4

How to form a polyamide

Di-acid + Di-amine

5

2 polymers used to form nylon-6,6

Hexanedioic acid

Hexane-1,6-diamine

6

How do polyamides differ when formed from amino acids or from diacid - diamine

Amino acid: alternating n-h and C=O

7

What does Kevlar make?

Bullet proof vests

8

What are the monomers that produce Kevlar?

Diamino benzene

Benzene-1,4-Di carboxylic acid

9

When making Kevlar what monomer can be used instead of benzene-1,4-di carboxylic acid?

Acyl chloride equivalent

10

Why can condensation polymers be broken down?

Delta positive C on C=O can be attacked by nucleophiles

11

Technical term for condensation polymers being broken down?

Hydrolysis

12

What can condensation polymers be broken down by?

An acid (eg HCl) or base (eg NaOH)

13

Why are condensation polymers environmentally friendly?

Can be hydrolysed by an acid or base due to delta positive C on C=O which can be attacked by nucleophiles

(Therefore biodegrades)

14

What must always be included in a diagram of lab fractional distillation?

Fractionating column
Ice bath
Heat

15

Can bifunctional molecules form condensation polymers?

Yep

16

For bifunctional molecules, how do you arrange to molecule to draw the repeating unit?

Put functional groups on each end

17

Name 2 uses for condensation polymers

Why are they a good basis for these materials?

Preparation of plastic bottles for fizzy drinks and fabrics

Biodegradable (susceptible to hydrolysis)

18

Why are alkanes un reactive

They have only strong, non-polar C-H and C-C

Not naturally broken down

19

How are addition polymers disposed of?

Landfill
Melted down and remoulded

20

3 problems with burning poly(alkenes)

Produces
CO2 (greenhouse gas)
CO (toxic gas)
Carbon (exacerbates asthma)

21

What are the advantages of recycling polymers?

All plastic derived from crude oil so recycling saves using this non-renewable resource and the energy needed to refine it

If not recycled usually ends up in landfills

22

What are the disadvantages of recycling?

Plastics needed to be collected, transported and sorted which uses energy (CO2 produced) and man power (expensive)

23

Why are condensation polymers biodegradable?

The delta positive C of C=O can be attacked by nucleophiles

24

Poly(alkenes) are made from additional polymerisation. True or false?

False

It is “addition” polymerisation not “additional”

25

Common name for polyesters

Terylene

26

What is a common name for polyamide?

Kevlar

Or

Nylon

27

What is the mechanism involved in addition polymerisation

A Free radical mechanism

28

What is used to make terylene

What else is produced

Benzene -1,4 - di carboxylic acid
And
Ethane-1,2- diol



Water

29

Catalyst for condensation polymerisation to occur

Strong acid or specific enzyme

30

Does nylon have a benzene ring

NO