A) Atactic polyvinylchloride
B) Isotactic polyvinylchloride
C) Syndiotactic polyvinylchloride
D) All of these
Correct Answer: C
Solution :
Syndiotactic polyvinylchloride \[\left( -C{{H}_{2}}-\underset{Cl\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-\overset{Cl\,\,}{\mathop{\overset{|\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-\underset{Cl\,}{\mathop{\underset{|\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-\overset{Cl\,\,\,}{\mathop{\overset{|\,\,\,\,\,}{\mathop{CH}}\,}}\, \right.\]\[-{{\left. C{{H}_{2}}-\underset{Cl\,\,\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{CH}}\,-}}\, \right)}_{n}}\] In this arrangement the chlorine atoms are alternately arranged. The polymer is stereoregular and has high crystallinity.
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