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What is the copolymer composition for azeotropic copolymerization of Acrylonitrile and 1,3-butadiene at 50ᵒC, given that r1=0.02 and r2=0.30?

What is the copolymer composition for azeotropic copolymerization of Acrylonitrile and 1,3-butadiene at 50ᵒC, given that r1=0.02 and r2=0.30? Correct Answer 0.417

For azeotropic copolymerization, Critical feed monomer composition is given by-(f1)c=(1-r2)/(2-r1-r2) Substituting the values, we get (f1)c=0.42 And copolymer composition is given by- F1 = (r1f12+f1f2)/(r1f12+2f1f2+r2f22). Thus, F1= 0.417.

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