Structural features of polylactide and natural rubber films produced by solution casting

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Composite film samples of polylactide-natural rubber with a rubber content of 5, 10 and 15 wt. % were obtained by the solution method. The study of morphology showed the presence of rubber inclusions in the form of drops in the polylactide matrix. Thermophysical characteristics were determined by differential scanning calorimetry. It was determined that when rubber was added, the peak of cold crystallization of polylactide disappears on melting thermograms, the melting temperature decreases by 1–4°C compared to 100% polylactide. The structure of the obtained compositions was studied by nuclear magnetic resonance, electron paramagnetic resonance, and X-ray diffraction. The diffraction patterns of the samples contain reflections characteristic of the crystalline α-form of polylactide.

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作者简介

Yu. Tertyshnaya

Emanuel Institute of Biochemical Physics of Russian Academy of Sciences; Plekhanov Russian University of Economics

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Email: terj@rambler.ru
俄罗斯联邦, Moscow; Moscow

M. Podzorova

Emanuel Institute of Biochemical Physics of Russian Academy of Sciences; Plekhanov Russian University of Economics

Email: terj@rambler.ru
俄罗斯联邦, Moscow; Moscow

S. Karpova

Emanuel Institute of Biochemical Physics of Russian Academy of Sciences

Email: terj@rambler.ru
俄罗斯联邦, Moscow

A. Krivandin

Emanuel Institute of Biochemical Physics of Russian Academy of Sciences

Email: terj@rambler.ru
俄罗斯联邦, Moscow

参考

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2. Fig. 1. 1H-NMR spectra of PLA (a) and 90PLA/10NK (b) samples.

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3. Fig. 2. EPR spectra of PLA/NC samples with NC content of 0 (1), 5 (2), 10 (3) and 15 (4) wt.%.

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4. Fig. 3. Melting thermograms of PLA/NC samples with NC content of 0 (1), 5 (2), 10 (3) and 15 (4) wt.%.

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5. Fig. 4. Diffraction patterns of PLA/NC film composites with NC content of 0 (1), 5 (2), 10 (3) and 15 (4) wt.%. Transmission measurement.

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6. Fig. 5. Micrographs of PLA/NC film composites with NC content of 0 (a), 5 (b), 10 (c) and 15 (d) wt.%.

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