The Flory-Huggins parameter for polystyrene and poly(1,4-phenylene oxide) (PPO) can be written as x = 0.059 43.0/T, where T is in Kelvin. (i) Without calculations, do these polymers ever mix? Why or why not? If they do mix, does the system have UCST behavior, LCST behavior, or neither? Explain your reasoning. (ii) Assume that polystyrene (Nps = 1500) and PPO (NPPO = 15 000) are combined. What is the critical value of the Flory-Huggins parameter for this system? (iii) Using your result from part (ii), at which temperatures (if any) can these two polymers mix together? Are these realistic temperatures that can be achieved in a lab/factory without the polymer degrading? Does your result agree with part (i)