L. D. Selezneva, M. V. Podzorova, Y. V. Tertyshnaya, R. R. Romanov, A. A. Popov
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The Impact of Water on Polylactide–Polybutylene Adipate Terephthalate Blends
Blends of polylactide and polybutylene adipate terephthalate of various compositions are obtained by mixing in the melt followed by pressing. The content of PBAT in the blends is 10, 20, and 30 wt %. The effect of water on film samples at a temperature of (22 ± 2)°C is studied for 270 days. After exposure, a change in morphology is detected: turbidity of the samples and the appearance of defects. The thermophysical characteristics before and after hydrolytic degradation are determined by differential scanning calorimetry. The decrease in the cold crystallization temperature in pure PLA and in a sample with a low content of PBAT (10%), as well as the disappearance of the cold crystallization peak at a content of 20 and 30 wt % of PBAT, is shown. The degree of crystallinity of PLA after exposure to water tends to increase from 0 to 16%. Changes in the chemical structure of the mixed samples are monitored by IR spectroscopy.
期刊介绍：
Russian Journal of Physical Chemistry B: Focus on Physics is a journal that publishes studies in the following areas: elementary physical and chemical processes; structure of chemical compounds, reactivity, effect of external field and environment on chemical transformations; molecular dynamics and molecular organization; dynamics and kinetics of photoand radiation-induced processes; mechanism of chemical reactions in gas and condensed phases and at interfaces; chain and thermal processes of ignition, combustion and detonation in gases, two-phase and condensed systems; shock waves; new physical methods of examining chemical reactions; and biological processes in chemical physics.
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