Question

How are crystalline and amorphous polymers different? Write about the properties and applications of any : - Four Crystalline polymers Four Amorphous polymers (7 Marks)

Answer 1

Crystalline polymers: These structures contains molecules which are very ordered generally, due to which they possess strength and rigidity. Here the molecules are locked against one another as in diamond and steel.

Amorphous polymers:On the other hand molecules of amorphous polymers are randomly arranged due to which chain moves across each other when being pushed or pulled.Therefore they possess elasticity and flexibility.

Four crystalline polymers are:

1) Diamond- It is used as jewellery and as a cutter to cut glass as it possess high strength.

2)Steel-It is used in automobile industries,boiler shell,aircrafts,machines and many more.

3) Nylon -used in garments,seatbelts,nets,ropes,parachutes etc.

4)Kevlar -used as bicycle tyres,bolletproof vests,racing sails.

Four amorphous polymers:

1)polystyrene-used in laboratory equipment and food packaging.

2)polycarbonate-used in compact discs,safety helmets,bullet proof glass.

3)polyetherimide-used in chemical lab equipments,containers and accessories.

4)polysulfone-used in battery caps,oil pumps,oil control pistons.