What Does PDI Stand For?
PDI stands for Polydispersity Index
The Polydispersity Index (PDI) is a quantitative measure used to characterize the distribution of molecular mass in a given polymer sample. It is defined as the ratio of the weight average molecular weight to the number average molecular weight, providing insights into the uniformity or variability of the polymer's molecular weights. A lower PDI indicates a more uniform sample, while a higher PDI suggests greater diversity in molecular size, which can impact the physical and chemical properties of the material. PDI is an essential parameter in fields such as polymer science, materials engineering, and biochemistry for assessing polymer quality and performance.
Added on 14th April 2008 | Last edited on 16th June 2025 | Edit Acronym