Which one of the following is an example of a thermosetting polymer?

Options

A. `-"("C_(2)H-underset(Cl)underset(|)C=CH-CH_(2)")"_(n)`
B. `-"("C_(2)H-underset(Cl)underset(|)C")"_(n)`
C. `-"("overset(H)overset(|)N-(CH_(2))_(6)-overset(H)overset(|)N-overset(O)overset(||)C-(CH_(2))_(4)-overset(O)overset(||)C")"_(n)`
D.

Answer

D

Explanation

novolac, a condenstation polymer of phenol and formaldehyde is a thermosetting polymer. Neoprene rubber
(a) `-"["CH_(2)-underset(Cl)underset(|)C=CH-CH_(2)-"]"and PVC`
(b) `-"["CH_(2)-underset("while nylon-66")underset(Cl)underset(|)(CH)-"]"` are thermoplastic polymers
(c ) `-"["NH-(CH_(2))_(6)-NHoverset(O)overset(||)C-(CH_(2))_(4)-overset(O)overset(||)C-"]"` is a polymidel which is commonly known as fibre.