Xiao-yun ZHANG. A Little about Average Molecular Weight and Polydispersity of Polymer in Teaching[J]. Polymer Bulletin, 2003,16(2):80-81. DOI: 10.14028/j.cnki.1003-3726.2003.02.012.
The standard deviation of the polymer molecular weight distribution is used to explain the relationship between the polydispersity index and the breadth of the polymer molecular-weight distribution. It will benefit the students to understand the physical meaning of the polydispersity index.