Polymerisation

Question 1

Explain how to form a polyamide repeat unit

Answer 1

Dicarboxylic Acid + Diamine —> repeat unit with amide bond + water

Question 3

Explain the hydrolysis of polyesters using an acid and alkali

Answer 3

Polyesters hydrolyse SLOWLY in STRONG ACID to reform the Carboxylic Acid and Alcohol

Polyesters hydrolyse QUICKLY in HOT ALKALI (NaOH) to form a carboxylate salt and alcohol

Question 4

Explain the hydrolysis of polyamide using an acid and alkali

Answer 4

Polyesters hydrolyse QUICKLY in STRONG ACID to reform the Carboxylic Acid and diammonium salt

Polyesters hydrolyse SLOWLY in HOT ALKALI (NaOH) to form a carboxylate salt and amines

Question 5

State and explain the type of polymerisation in polyesters and polyamides

Answer 5

Polyesters and Polyamides are formed by condensation polymerisation. This is where 2 monomers is different functional groups react to form a polymer and water

Question 8

Explain how to form a polyester repeat unit

Answer 8

Dicarboxylic Acid + Dialcohol —> repeat unit with Ester bond + water