Polymers

Dependence of the sizes of associates in the structure of an amorphous polymer on thermal history

V. M. Egorov, V. A. Ryzhov, A. K. Borisov

Ioffe Institute, St. Petersburg, Russia

Abstract: Using the methods of long-wave infrared spectroscopy and differential scanning calorimetry, the influence of thermal history on nano-sized regions of amorphous atactic polystyrene was studied. The spectroscopic method revealed an increase in the concentration of polymer chain segments with stronger intermolecular interactions. The calorimetric method detected endothermic effects, the intensity of which depended on the thermal history of the polymer samples. Thermal effects were analyzed within the framework of the thermodynamic theory of diffuse phase transitions.

Keywords: molecular dynamics, polystyrene, phase and relaxation transitions, heat capacity.

Received: 24.12.2023
Revised: 24.12.2023
Accepted: 25.12.2023

DOI: 10.61011/FTT.2024.02.57254.276

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