The reactivity of a combination of monomers depends a great deal on the nature of the...

The reactivity of a combination of monomers depends a great deal on the nature of the polymerizing center. For example, the reactivity ratios of butadiene (1) and styrene (2) are quite different in an anionic copolymerization (r1 = 5, r2 = 0.04) and in a radical copolymerization (r1 = 1.39, r2 = 0.78). If a copolymerization is performed with a 50/50 mixture of the two, what are the initial compositions of the polymers formed in the two different copolymerization reactions?

Expert Solution

For the anionic copolymerization, the mole fractions of butadiene and styrene in the copolymer composition are respectively F₁ = 0.85 and F₂ = 0.15 .

For the radical polymerization, the mole fractions of butadiene and styrene in the copolymer composition are respectively F₁ = 0.56 and F₂ = 0.44 .

The detail calculation is shown below.

queen_honey_blossom answered 5 months ago

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