Determination of Cooperativity Length in a Glass-Forming Polymer.

ABSTRACT: To describe the properties of glass-forming liquids, the concepts of a cooperativity length or the size of cooperatively rearranging regions are widely employed. Their knowledge is of outstanding importance for the understanding of both thermodynamic and kinetic properties of the systems under consideration and the mechanisms of crystallization processes. By this reason, methods of experimental determination of this quantity are of outstanding importance. Proceeding in this direction, we determine the so-called cooperativity number and, based on it, the cooperativity length by experimental measurements utilizing AC calorimetry and quasi-elastic neutron scattering (QENS) at comparable times. The results obtained are different in dependence on whether temperature fluctuations in the consider

SUBMITTER: Chua YZ 

PROVIDER: S-EPMC10037462 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature