The polydispersity index (PDI) is a numerical value that indicates the distribution of molecular weights in a given polymer sample. It provides insight into the uniformity or heterogeneity of the polymer chains, with a lower PDI suggesting a more uniform sample and a higher PDI indicating greater variability. Understanding PDI is crucial for assessing the properties of polymers, including their mechanical behavior, processing characteristics, and overall performance in applications.
congrats on reading the definition of Polydispersity Index. now let's actually learn it.