polymer chemistry and engineering

solution

1. Equal concentrations of acrylonitrile (M.W.=55g/mol) and methyl methacrylate (M. W. = 100g/mol) are each polymerized in separate reactors at 60C with equal concentrations of the same initiator. Assume polyacrylonitrile undergoes termination only by coupling and poly(methyl methacrylate) by disproportionation. Assume there is no chain transfer and that initiator efficiencies are the same for both reactions. A) Which polymer would have the higher number average degree of polymerization, and by how much? B) Which would have the higher number average molecular weight, and by how much? (Use initial concentrations to make calculations) 1. A) Xn,polyacrylonitrile=1.37Xn,PMMA B) Mn,polyaciylonitrile=0.75Mn,PMMA