Polymers

Question 1

Explain why addition polymers are unreactive?

Answer 1

Saturated so contain no double bonds
Non-polar
Therefore unreactive

Question 2

Explain the nature of IMF of molecules of polyalkenes?

Answer 2

Non polar - VDW forces only (weak)

Question 3

Explain the nature of IMF of polyalkenes affected by chain length ?

Answer 3

Longer polymer chain and closer together they are = stronger VDW between chains

Question 4

Nature of long straight polyalkenes ?

Answer 4

Strong and rigid

Question 5

Nature of short , branched chain polyalkenes?

Answer 5

Weaker
Flexible

Question 6

What can be added to plastic to increase flexibility?

Answer 6

Plasticiser

Question 7

Uses of PVC?

Answer 7

Long closely packet chains - brittle and hard
Used in drainpipes + window frames

Question 8

Used of plasticised PVC?

Answer 8

More flexible
Used for clothing, electrical cable insulation

Question 9

Used of plasticised PVC?

Answer 9

More flexible
Used for clothing, electrical cable insulation