Number average, Weight average and viscosity average molecular weight (Comparison): • We know that the number average molecular weight, Weight average molecular weight and viscosity average molecular weight are given by Number average, Weight average and viscosity average molecular weight. • For monodisperse sample Number average molecular weight = Weight average molecular weight. Number average molecular weight = Weight average molecular weight. • When a is unity Weight average molecular weight = viscosity average molecular weight. Weight average molecular weight = viscosity average molecular weight. • For a polydispersed polymer Relation between number average,weight average and viscosity average molecular weight. as shown in fig below Distribution of molecular weights in a typical polymer sample. • Let us compare the number average molecular weight and weight average molecular weight. The number average molecular weight and weight average molecular weight.
Polymers
All about Polymers and polymer chemistry for undergraduate students.