2. Medicoplastic Industry manufactures disposable syringe for medical purposes. A new polymer batch with a higher molecular weight than the current polymer grade will be supplied as raw material. The current polymer grade has a degree of polymerization of 350 and the processing parameter for the injection molding was set for a melt viscosity of 1500 Poises and a heating temperature of 150*C. You are to select a suitable polymer to be used to replace the current polymer grade from TABLE Q2. Justify your choice of polymer, suggest the new melt processing parameters, and its molecular weight. TABLE Q2 Polymer C1' C2' Tg (K) Polyisobutylene 16.6 104 202 Natural rubber (Hevea) 16.7 53.6 200 Polyurethane elastomer 15.6 32.6 238 Polypropylene 15.5 50.3 286 Polystyrene 14.5 50.4 373 Polymethyl methacrylate 17.6 65.5 335