unit 5 polymers

Question 1

what is addition polymerisation?

Answer 1

The C=C double bond will open up and bond with other molecules.

Question 2

What is condensation polymerisation?

Answer 2

A small molecule (water) is lost as molecules join together

Each monomer has at least two functional groups than react with a different group on a different molecule

Question 3

Name water soluble polymer and say why it is soluble

Answer 3

Poly(ethanol). Formed from ethanol and it contains an OH for hydrogen bonds with water

Question 4

How are polyamides formed?

Answer 4

Dicarboxylic acids react with amino groups of diamines to give amide links (-CONH-)
Water is formed in the process.

Question 5

What are some of the physical properties of polyamides?

Answer 5

Very high tensile strength

Can be used at high temperatures and are resistant to most chemicals.

Question 6

How are polyesters formed?

Answer 6

Dicarboxylic acids and diols form ester links (-COO-)

Water is formed in the process

Question 7

How is terylene formed?

Answer 7

Ethane-1,2-diol reacts with benzene-1,4-dicarboxylic acid

Question 8

What are peptide links?

Answer 8

C double bonded to O and an NH

Question 9

How do proteins form?

Answer 9

A condensation reaction between two amino acids.

The COOH of one acid and the NH2 of another bond to give a peptide link and water.