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Question: The degree of crystallinity of which of the following is highest...

The degree of crystallinity of which of the following is highest

A

Atactic polyvinylchloride

B

Isotactic polyvinylchloride

C

Syndiotactic polyvinylchloride

D

All of these

Answer

Syndiotactic polyvinylchloride

Explanation

Solution

Syndiotactic polyvinylchloride

(−CH2−CH∣Cl−CH2−CH∣Cl−CH2−CH∣Cl−CH2−CH∣Cl \left( - CH_{2} - \underset{Cl}{\underset{|}{CH}} - CH_{2} - \overset{Cl}{\overset{|}{CH}} - CH_{2} - \underset{Cl}{\underset{|}{CH}} - CH_{2} - \overset{Cl}{\overset{|}{CH}} \right.\

− CH2−CH∣−Cl)n- \left. \ CH_{2} - \underset{Cl}{\underset{|}{CH} -} \right)_{n}

In this arrangement the chlorine atoms are alternately arranged. The polymer is stereoregular and has high crystallinity.