Question

What is not true regarding free radical polymerisation of propene?

• A. Without proper control, atactic polypropylene is formed
• B. Use of Ziegler-Natta catalyst results in isotactic polypropylene
• C. During polymerisation, a linear unbranched. crystalline polymer is usually obtained
• D. During polymerisation, a secondary free radical Is produced in every step

Answer 1

Answer: (C)

Chain branching always occur during olefenic polymerisation due to abstraction of some H-radical from the growing polymer chain.