Structural Features of Polylactide and Natural Rubber Films Produced by Solution Casting

IF 1.4 4区 化学 Q4 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Russian Journal of Physical Chemistry B Pub Date : 2024-05-29 DOI:10.1134/S1990793124020313
Yu. V. Tertyshnaya, M. V. Podzorova, S. G. Karpova, A. V. Krivandin
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Abstract

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 their morphology shows the presence of rubber inclusions in the form of drops in the polylactide matrix. The thermophysical characteristics are determined by differential scanning calorimetry (DSC). It is determined that when rubber is added and the peak of cold crystallization of polylactide (PLA) disappears on the melting thermograms, the melting temperature decreases by 1–4°C compared to 100% PLA. The structure of the obtained compositions is studied by nuclear magnetic resonance, electron paramagnetic resonance (EPR), and X-ray diffraction. The diffraction patterns of the samples contain reflections characteristic of the crystalline α-form of PLA.

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溶液浇铸法生产的聚乳酸和天然橡胶薄膜的结构特征
摘要 通过溶液法获得了橡胶含量为 5、10 和 15 wt % 的聚乳酸-天然橡胶复合薄膜样品。对其形态的研究表明,在聚乳酸基体中存在滴状的橡胶夹杂物。热物理特性是通过差示扫描量热法(DSC)测定的。结果表明,加入橡胶后,熔融热图上聚乳酸(PLA)的冷结晶峰消失,熔融温度比 100% 聚乳酸降低 1-4°C 。通过核磁共振、电子顺磁共振(EPR)和 X 射线衍射研究了所获成分的结构。样品的衍射图样包含聚乳酸结晶 α 形式的特征反射。
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来源期刊
Russian Journal of Physical Chemistry B
Russian Journal of Physical Chemistry B 化学-物理:原子、分子和化学物理
CiteScore
2.20
自引率
71.40%
发文量
106
审稿时长
4-8 weeks
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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