The plastics if are hard, become soft and readily workable by addition of certain compounds called
Catalysts
Telomers
Plasticisers
Vulcaniser
e.g.- PVC is extremely stiff and hard but the addition of di-n butyl phthalate Plasticizers makes it soft and rubber like.
Explain why, thermoplastics become soft on heating but thermosetting plastics do niot become soft on heating. Draw labelled diagrams to illustrate your answer.
Female condoms are made from a soft plastic material called nitrile.