Specific heat relaxation during macromolecule growth
Authors: Ferrari C., Salvetti G., Tombari E., Johari G.P.
Autors Affiliation: Istituto di Fisica Atomica e Molecolare del Consiglio Nazionale delle Ricerche, Via del Giardino 7, Pisa, 56100, Italy; Department of Materials Science and Engineering, McMaster University, Hamilton, ON, L8S-4L7, Canada
Abstract: When dissimilar molecules in a liquid mixture react isothermally to form covalent bonds and linear chain macromolecules grow until the liquid vitrifies, the complex C-p of the mixture measured for a fixed frequency decreases. The real component of this C-p measured as a function of the number of covalent bonds formed, or macroscopic reaction time, shows a dispersionlike decrease and the imaginary component a peak. From these data, the evolution of structural relaxation time during the growth of the macromolecules has been determined and its formalism given.
Journal/Review: PHYSICAL REVIEW E
Volume: 54 (2) Pages from: R1058 to: R1061
KeyWords: DIELECTRIC-SPECTROSCOPYDOI: 10.1103/PhysRevE.54.R1058Citations: 45data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2023-05-28References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here