Morphology and thermal kinetics of electron beam irradiated polyetherimide/ polylactic acid (PEI/PLLA) blends

IF 1.7 4区综合性期刊 Q2 MULTIDISCIPLINARY SCIENCES

Journal of Radiation Research and Applied Sciences Pub Date : 2025-03-29 DOI:10.1016/j.jrras.2025.101399

Abdullah Ali Alamri

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Abstract

This research describes the effect of electron beam irradiation on the morphological properties and the thermal kinetics of polyetherimide/polylactic acid (PEI/PLLA) blends. We prepared blends based on different ratios by dissolving them in chloroform to form thin films through casting their solutions. These blend films were then subjected to the electron beam irradiation with the resulting films being thoroughly examined by various techniques including thermogravimetric analysis, differential scanning calorimetry, and scanning electron microscopy. The thermal stability of the films was further investigated by the determination of the activation energy by two distinct approaches relying on the Broido and Coats-Redfern approximation equations. Based on weight loss and reaction rate, the thermogravimetric analysis (TGA) results showed that, adding up to 10 % of PLLA to the PEI/PLLA blends improved the thermal stability. The glass transition temperature (Tg) of PEI or PLLA was not revealed by the differential scanning calorimetry (DSC) scans; but DSC showed the existence of compatibility by revealing a new single glass transition.

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电子束辐照聚醚酰亚胺/聚乳酸（PEI/PLLA）共混物的形貌和热动力学

本文研究了电子束辐照对聚醚酰亚胺/聚乳酸（PEI/PLLA）共混物形貌和热动力学的影响。我们根据不同的配比制备了混合物，将它们溶解在氯仿中，通过浇铸形成薄膜。然后将这些混合膜置于电子束照射下，通过各种技术（包括热重分析、差示扫描量热法和扫描电子显微镜）对所得膜进行彻底检查。利用Broido和Coats-Redfern近似方程两种不同的方法测定活化能，进一步研究了膜的热稳定性。基于失重和反应速率，热重分析（TGA）结果表明，在PEI/PLLA共混物中添加10%的PLLA可以提高热稳定性。差示扫描量热（DSC）扫描未显示PEI或PLLA的玻璃化转变温度（Tg）；但DSC通过揭示新的单玻璃化转变表明了相容性的存在。

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

Journal of Radiation Research and Applied Sciences MULTIDISCIPLINARY SCIENCES-

自引率

5.90%

发文量

130

审稿时长

16 weeks

期刊介绍： Journal of Radiation Research and Applied Sciences provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and applications of nuclear, radiation and isotopes in biology, medicine, drugs, biochemistry, microbiology, agriculture, entomology, food technology, chemistry, physics, solid states, engineering, environmental and applied sciences.