polymer 501

Problem 2. In a plant that makes ski goggles, polycarbonate (molecular weight 1,000,000 g/mol,Tg=145C ) is heated at 165C and pressed in a mold. It was decided to reduce the processing temperature to 160C in an effort to save energy. (A) the pump work is proportional to the melt viscosity, what percentage change in pump work would be needed to go from the old to the new processing temperature? (B) If having a different sized pump was not an option, what molecular weight should the new process employ to keep the original pump work but still accommodate the lower processing temperature