Blends of polycarbonate with polyethylene terephthalate glycol: compatibility of components, rheological and mechanical properties
https://doi.org/10.29235/1561-8323-2019-63-1-121-128
Abstract
The influence of the component ratio in the stabilized binary blends of amorphous polycarbonate (PC) and polyethylene terephthalate glycol (PET-G) on the compatibility of components, relaxation, rheological and mechanical properties was studied. The materials were prepared by reactive mixing of the components in the melt in a mixing rectifier based on a twin-screw extruder with unidirectional screw rotation. It is established that the components in the blends are mutually soluble over the entire range of their concentrations. The temperature of the а-process of relaxation (the glass transition temperature, Tg, in the mixtures) is in the interval between the values of TgPC = 148.3 °C, TgPET-G = 82.0 °C and obeys the Fox equation for single-phase blends. The mechanical characteristics of the mixtures change in a non-additive way when the concentration of the components is varied. In particular, in blends in which the PC content prevails, a significant increase in the upper yield limit is observed in comparison with the additive values, which, according to the relaxation spectrometry, is due to intense intermolecular interactions.
About the Authors
V. N. Koval
V.A. Belyi Metal-Polymer Research Institute, National Academy of Sciences of Belarus
Belarus
Belarus
Koval Vasili Nikolaevich - Ph. D. (Engineering), Head of the Sector.
32a, Kirov Str., 246050, Gomel
S. S. Strogоnova
Mogilevkhimvolokno, Open Joint-stock Company
Belarus
Belarus
Strogonova Suzana Sergeevna - Process Engineer.
45, Shmidt Ave., 212035, Mogilev
S. S. Pesetskii
V.A. Belyi Metal-Polymer Research Institute, National Academy of Sciences of Belarus
Belarus
Belarus
Pesetskii Stepan Stepanovich - Corresponding Member, D. Sc. (Engineering), Professor, Heard of the Department.
32a, Kirov Str., 246050, Gomel
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