help! polyner physics A-D

Due date: February 20, 2023 polymer is polystyrene (PS) which dissolves in benzene such that Hm=0. The other two polymers are poly(methylmethacrylate) (PMMA) and polyethylene (PE). Which of these latter two polymers is Polymer A based on the solubility parameter? Hint, if their chemical structures are similar their solubility parameters of two different molecules are also similar to each other. B. If the maximum degree of polymerization, Ncit, to make a miscible 50/50 PS/PMMA mixture is about 10,000 at 25C, estimate the value of Ncrit for PE/PMMA at 25C. C. Estimate the ratio of the critical temperatures, Tc(PS/PMMA)/Tc(PS/PE), when the degree of polymerization of the four polymers are the same. D. Estimate the value of the osmotic pressure at 25C for a PS sample of number average degree of polymerization 1000 in benzene solution at concentration of 0.1g/ml. R=82.1cm3atm/Kmol and the density of benzene is 0.877g/ml Due date: February 20, 2023 polymer is polystyrene (PS) which dissolves in benzene such that Hm=0. The other two polymers are poly(methylmethacrylate) (PMMA) and polyethylene (PE). Which of these latter two polymers is Polymer A based on the solubility parameter? Hint, if their chemical structures are similar their solubility parameters of two different molecules are also similar to each other. B. If the maximum degree of polymerization, Ncit, to make a miscible 50/50 PS/PMMA mixture is about 10,000 at 25C, estimate the value of Ncrit for PE/PMMA at 25C. C. Estimate the ratio of the critical temperatures, Tc(PS/PMMA)/Tc(PS/PE), when the degree of polymerization of the four polymers are the same. D. Estimate the value of the osmotic pressure at 25C for a PS sample of number average degree of polymerization 1000 in benzene solution at concentration of 0.1g/ml. R=82.1cm3atm/Kmol and the density of benzene is 0.877g/ml