Which of the following statements concerning the stereochemistry of polymerization is (are)correct?
A)Polymers in the atactic configuration are more likely to be crystalline solids because regular packing of the polymer chains is easier.
B)Polymers in the isotactic configuration tend to be softer and more flexible than atactic polymers.
C)In general, radical polymerization leads primarily to branched polymers in the syndiotactic configuration.
D)The percentage of chains in the isotactic or syndiotactic configuration decreases as the polymerization temperature decreases.
E)none of the above

Question

Quizplus · Accepted Answer

None of the statements are correct. Atactic polymers are usually amorphous and less crystalline due to irregular packing. Isotactic polymers are more crystalline and rigid. Radical polymerization typically leads to atactic polymers, not syndiotactic. Lower temperatures generally favor more regular (isotactic or syndiotactic) configurations.

Which of the Following Statements Concerning the Stereochemistry of Polymerization