6.3.1: Condensation polymers

Question 1

Condensation polymerisation

Answer 1

Involves two different types of monomer each with at least two functional groups, forms a link between groups and releases to a small molecule, lots of monomers forma polymer

Question 2

Small molecules released from condensation polymerisation

examples 2

Answer 2

H2O, HCl

Question 3

Polyamides formed by

Answer 3

condensation reactions between dicarboxylic acids and diamines

Question 4

Nylon 6,6 formed from monomers of?

Answer 4

hexandoic acid and 1,6-diaminohexane

Question 5

Nylon 6,6

properties and uses

Answer 5

strong, resilient to abrasion

used to make: clothing, carpet, rope, parachutes, airbags

Question 6

Kevlar formed from monomers of?

Answer 6

benzene-1,4-dicarboxylic acid and 1,4-diaminobenzene

Question 7

Kevlar

properties and uses

Answer 7

can form hydrogen bonds, light very strong

used to make: bullet proof vests, car tyres

Question 8

Peptides

Answer 8

polymers of amino acids

Question 9

Bond/link in polyamides

made up of?

Answer 9

amide link

C=O bonded to N-H

Question 10

Bond/link in polypeptides

made up of?

Answer 10

peptide/amide link

C=O bonded to N-H

Question 11

Polyesters formed from monomers of?

Answer 11

dicarboxylic acids and doils

Question 12

Bond/link in polyesters

made up of?

Answer 12

ester link

C=O and -O-

Question 13

Terylene formed from monomers of?

Answer 13

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

Question 14

Terylene

properties and uses

Answer 14

some forms: stable at cold and hot temps.
used in containers for ready meals
some forms: used in plastic bottles, clothing, sails, sheets

Question 15

Water hydrolysis of amide links in polyamides results in formation of?

Answer 15

diamine and dicarboxylic acid molecules

Question 16

Water hydrolysis of ester links in polyesters results in the formation of?

Answer 16

diol and dicarboxylic acid molecules

Question 17

What is used instead of water for hydrolysis in a lab and why?

Answer 17

• acid or alkali
• polyamides are hydrolysed more easily in acidic condition and polyesters are hydrolysed more easily in basic conditions
• the reaction with water is too slow

Question 18

Which condition for hydrolysis of polyamides

Answer 18

acidic

Question 19

Which condition for hydrolysis of polyesters

Answer 19

basic

Question 20

Difference in property between condensation and addition polymers

Answer 20

condensation polymers are generally stronger and more rigid

Question 21

Why are condensation polymers stronger and more rigid than addition polymers?

Answer 21

condensation polymers are made up of chain containing polar bonds eg: C=O, C-N, C-O
so as well as induced dipole-dipole forces, they have very strong hydrogen bonds between polymer chains