Polymer melts Critical Molecular weight Mwe of a polymer Mw Mwe;no ofmolten polymer is almost directly proportional to the weight average molecular weight Mww Mw>MWe;no is 。-K[Mw]4Polymer melts Critical Molecular weight Mwe of a polymer Mw < Mwe ; ho of molten polymer is almost directly proportional to the weight average molecular weight Mww Mw > Mwe ; ho is ho  KMww  3.4