Question

What is the difference between step-growth polymerization and chain polymerization?

Answer 1

❤The main difference is this: In a step growth reaction, the growing chains may react with each other to form even longer chains. ...

❤The monmomer or dimer may react in just the same way as a chain hundreds of monomer units long.

❤But in an addition polymerization, only monomers react with growing chains.✔✔

Answer 2

$\huge\underline{\bold{Answer :-}}$

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$\bigstar\underline{\pink{\bold{Chain \:growth\: polymerisation}}} \implies$

This type of polymerisation involves chain reaction. The monomer molecules get added to growing chain resulting in the formation of a polymer.

This type of polymerisation is initiated by the active species such as free radical, carbocation or carbanion. For examples PVC, polyethylene, polypropylene etc.

$\bigstar\underline{\green{\bold{Step \:growth\:polymerisation }}} \implies$

This type of polymerisation involves a series of reactions in a stepwise manner. The monomers generally have multifunctional groups.

This type of polymerisation involves condensation reactions. For example, bakelite, nylon-66, etc.