In the mechanism of free-radical addition polymerization, the chain termination step halts the growt — Polymers Chemistry Question

💡 Solution & Explanation

Free radical chains generally terminate by the collision of two active radical ends. This can happen via direct coupling (combination) forming a single long chain, or by disproportionation, yielding two separate chains (one with an alkane end, one with an alkene end). Back-biting causes branching (transfer), not immediate termination.