精选优质文档-倾情为你奉上Chapter 11、 What are molecular weight and polydispersity of polymers?The molecular weight of polymers is actually the average molecular weight of polymers, which is used to describe the size of polymers and is associated with the properties of polymers, like mechanical strength and viscosity. And there are usually three kinds of molecular weight of polymers according to different methods: number-average molecular weight, weight-average molecular weight, and viscosity-avera