In the work, the effect of 120-day exposure to distilled water and seawater at 23°C on the structure and properties of polylactide was studied. It was found that the melting and glass transition temperature of polylactide decreased by 2°C in distilled water, while the crystallinity degree increased by 9 and 5% in distilled water and in seawater, respectively. Atomic force microscopy revealed pores defects with a diameter of 150–200 and 170–230 μm after exposure to seawater and distilled water, respectively. Elongation and tensile strength at break were significantly reduced during the hydrolytic degradation of polylactide.

中文翻译：

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聚乳酸在蒸馏水和海水中的水解降解

在工作中，研究了在 23°C 的蒸馏水和海水中暴露 120 天对聚乳酸结构和性能的影响。发现聚丙交酯在蒸馏水中的熔融温度和玻璃化转变温度降低了 2°C，而在蒸馏水和海水中的结晶度分别增加了 9% 和 5%。原子力显微镜显示，暴露于海水和蒸馏水后，孔隙缺陷的直径分别为 150-200 和 170-230 μm。在聚乳酸水解降解过程中，断裂伸长率和拉伸强度显着降低。