Phase Equilibria, Diffusion and Structure in the Epoxypolycaprolactone System

Авторы: Plyusnina Irina O., Budylin Nikita Yu, Shapagin Alexey V.
Журнал: Polymers
Том: 15
Номер: 1
Год издания: 2023
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Номер статьи: 117
DOI: 10.3390/polym15010117
Аннотация: Currently, there is no quantitative approach for the phase structure of cured thermoplasticsystems modified with thermoplastic predicting. To solve this problem, we carried out the first stageof the study on a model polycaprolactone–epoxy oligomer (PCL–DGEBA) system. Using differentialscanning calorimetry (DSC), refractometry and optical interferometry, a phase diagram for PCL–DGEBA mixtures was constructed, and the Flory–Huggins interaction parameters of PCL–DGEBAmixtures were calculated. The structure of PCL–DGEBA mixtures with different PCL content wasanalyzed by optical microscopy. The change in the structure formation mechanism with increasingPCL concentration was shown. The diffusion coefficients are calculated by the Motano–Boltzmannmethod. The values of the apparent activation energy of the viscous flow PCL and of self-diffusionof DGEBA are determined. The obtained data will be used for the in situ curing kinetics and phaseequilibria in the diffusion zone investigations in order to develop a quantitative method for predictingthe phase structure of cured systems.
Добавил в систему: Плюснина Ирина Олеговна

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