Question

Which of the following is a thermoplastic resin?

(a) Casein

(b) Phenol formaldehyde

(c) Cellulose

(d) Urea-formaldehyde

This question was posed to me in a national level competition.

This is a very interesting question from Plastics topic in portion Steel, Timber, Mortar, Plastics, Non-Ferrous Metals and Alloys of Construction & Building Materials

Answer 1

Correct choice is (c) Cellulose

To elaborate: Just like plastics, resins are also classified into thermoplastic resins and thermosetting resins depending on their behaviour with respect to heating. Cellulose is an example of thermoplastic resin. Phenol formaldehyde, casein and urea-formaldehyde are examples of thermosetting resins.