Dynamics of the Degradation of Polylactide-Natural Rubber Films under the Influence of UV-Irradiation

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/S1990793124020143

M. V. Podzorova, Yu. V. Tertyshnaya

引用次数: 0

Abstract

The effect of ultraviolet radiation of various wavelengths (254 and 365 nm) on compositions based on polylactide with the addition of natural rubber was studied. It was found that the effect of the UV wavelength of 254 nm on the studied samples was much more active than that of UV 365 nm, which was characterized by a decrease in the melting temperature and the degree of crystallinity of polylactide in the compositions, as well as a deterioration in the physical and mechanical properties. The FTIR-ATR spectroscopy method confirmed the photodegradation process by the change in the intensities of structurally sensitive polylactide and natural rubber bands.

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紫外线照射下聚乳酸-天然橡胶薄膜的降解动力学

摘要研究了不同波长（254 和 365 纳米）的紫外线辐射对添加了天然橡胶的聚乳酸成分的影响。研究发现，波长为 254 纳米的紫外线对所研究样品的影响比波长为 365 纳米的紫外线更强烈，其特点是组合物中聚乳酸的熔化温度和结晶度降低，物理和机械性能变差。傅立叶变换红外-ATR 光谱法通过对结构敏感的聚乳酸和天然橡胶带的强度变化证实了光降解过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.