【Basic Knowledge of Glossary Definitions for “Polymers and Materials”-006】Glossary definitions related to polymers
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1. Polymer molecular weight: the product of the molecular weight of the repeating unit and the number of repeating units； or the product of the number of structural units and the molecular weight of each structural unit. 2. Number-average molecular weight: the statistical average molecular weight obtained by averaging the numbers of molecules with different molecular weights in a polymer. 3. Weight-average molecular weight: The statistical average molecular weight of a polymer, calculated as the average of the molecular weights of its components with different molecular weights. 4. Viscosity-average molecular weight: The molecular weight of a polymer determined using viscosity measurements. 5. Molecular weight distribution: Since polymers are generally composed of mixtures of homologs with different molecular weights, their molecular weights exhibit a certain distribution. This distribution can be represented either by a distribution index or by a molecular weight distribution curve. 6. Polydispersity: Polymers are usually made up of a mixture of macromolecular homologs with varying relative molecular weights; the term polydispersity is used to describe the fact that the relative molecular weights of these components are not all equal
I’ll learn* from it; thanks for sharing, OP! ! ! ! ! ! ! ! ! ! ! ! ! !
How is a molecular weight distribution graph created?
I still don’t understand number-average molecular weight and weight-average molecular weight. Could some expert explain them in simple terms?