Question

Why should the monomers used in addition polymerisation through free radical pathway be very pure ?

Answer 1

HEY MATE HERE IS YOUR ANSWER

This is because even small amounts of impurities may combine with free radical polymerisation and thus, acts as inhibitors which slow down or even stop the polymerisation.

HOPE IT WILL HELP YOU

Answer 2

Question_

Why should the monomers used in addition polymerisation through free radical pathway be very pure ?

Answer~

During free radical polymerisation, should be very pure because even very trace amount of impurities may act as inhibitors which leads to the formation of polymer with shorter length.