Kinetics of copolymerisation and Composition of copolymer.

We must know that

Where r₁ and r₂ are the reactivity ratio's for the given pair of monomers.
Where the above equation is called Copolymerisation equation and it gives the copolymerisation composition without using radical concentration.

Types of copolymerisation ( kinetics significance)

Let us take the reactivity ratio's product of monomers i.e

Product of reactivity ratios.

Depending on whether this product is less, greater or equal to unity copolymers are divided into three types.

1)Ideal copolymerisation

Here the product of reactivity ratios is equal to unity, i.e r₁r₂=1

2) Alternating copolymerisation

Here the product of reactivity ratios is equal to zero, i.e r₁r₂=0.

3)Block copolymerisation

Here the product of reactivity ratios is greater than 1, i.e r₁r₂>1.

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Polymers

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