3.12 Polymers

Question 1

What is condensation

Answer 1

Small molecule eliminated (usually H2O) to form a larger molecule

Question 2

How many monomers are condensation polymers usually formed from

Answer 2

2

Question 3

What properties do these monomers forming condensation polymers have

Answer 3

Each has 2 functional groups

Question 4

Examples of condensation polymers

Answer 4

Polyesters
Polyamides
Polypeptides

Question 5

What is the linkage in a polyester

Answer 5

The ester linkage

Question 6

What are the 2 monomers which form a polyester (generic names and structures)

Answer 6

Diol and dicarboxylic acid or a molecule with both alcohol and a carboxylic acid functional groups

Question 7

Draw a generic repeating unit for a polyester

Answer 7

Google

Question 8

Which monomers is Terylene made from

Answer 8

Benzene-1,4-dicarboxylic acid
Ethane-1,2-diol

Question 9

Draw the repeating unit of Terylene

Answer 9

google

Question 10

What is Terylene used for

Answer 10

As a fibre for making clothes

Question 11

What is the linkage in a polyamide

Answer 11

Peptide linkage
google

Question 12

What are the 2 monomers used to form a polyamide (generic names and structures)

Answer 12

Diamine and dicarboxylic acid

Question 13

Examples of polyamides

Answer 13

Nylon, kevlar

Question 14

What is Kevlar used for

Answer 14

In body armour eg bullet proof vests

Question 15

Which monomers is kevlar made from

Answer 15

1,4-diaminobenzene
Benzene-1,4-dicarboxylic acid

Question 16

What is the repeating unit of kevlar

Answer 16

google

Question 17

Why is kevlar so strong

Answer 17

Rigid chains and close packing of flat aromatic rings

Question 18

Draw the repeating unit of a polypetide

Answer 18

google

Question 19

Why are poly(alkenes) not biodegradable

Answer 19

Non-polar CH bonds and CC bonds

Question 20

Why is it bard to burn poly(alkenes)

Answer 20

Releases CO2, CO, C and other toxic chemicals from monomers

Question 21

Why cant condensation polymers be broken down

Answer 21

They have polar bonds

Question 22

How are condensation polymers broken down

Answer 22

Hydrolysis

Question 23

What does draw the polymer mean

Answer 23

Draw with square brackets, n, and trailing bonds

Question 24

What does draw the repeating unit mean

Answer 24

Just draw the molecule, with trailing bonds - no brackets or n

Question 25

What is the difference between addition and condensation polymerisation

Answer 25

Condensation makes the polymer and eliminates a small molecule; addition polymerisation breaks C=C to form only one product (just the polymer)

Question 26

Why do polyesters not show hydrogen bonding

Answer 26

All O-H bonds are removed during polymerisation