Thermal Decomposition Behavior of Polylactic Acid-Based Polyurethane Resin

IF 1.4 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Polish Journal of Environmental Studies Pub Date : 2023-12-06 DOI:10.15244/pjoes/172833

Xuefeng Lei, Yiwei Ou, Yuehui Wang, Junxian Ma, Qiulian Lin

引用次数: 0

Abstract

The thermal degradation performance of the polylactic acid (PLA)-based polyurethane resin was investigated by thermogravimetric analysis (TGA), thermogravimetric analysis combined with Fourier transform infrared spectroscopy (TG-FTIR) and thermal cracking gas chromatography/mass spectrometry (PY-GC/MS), while the thermal decomposition mechanism and activation energy were analyzed by different degradation mechanism models. The result demonstrates that the PLA-based polyurethane resin conforms to A2 (nuclear growth) mechanism, and the activation energy of the reaction gradually decreases as the conversion rates increases. The main degradation of polyurethane resin is the decomposition of carbamate, ester group, amide and urea group by comparing the results of the data, and the products of the thermal decomposition are mainly small molecules of primary amine, carbon dioxide, enol, enolic acid and aldehydes.

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聚乳酸基聚氨酯树脂的热分解行为

采用热重分析(TGA)、热重分析结合傅里叶变换红外光谱(TG-FTIR)和热裂解气相色谱/质谱分析(PY-GC/MS)研究了聚乳酸(PLA)基聚氨酯树脂的热降解性能，并采用不同的降解机理模型分析了热分解机理和活化能。结果表明，聚乳酸基聚氨酯树脂符合A2(核生长)机理，反应活化能随着转化率的提高而逐渐降低。通过对数据结果的比较，聚氨酯树脂的主要降解是氨基甲酸酯、酯基、酰胺和尿素基的分解，热分解的产物主要是伯胺、二氧化碳、烯醇、烯醇酸和醛类小分子。

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

Polish Journal of Environmental Studies 环境科学-环境科学

CiteScore

3.10

自引率

11.10%

发文量

430

审稿时长

4 months

期刊介绍： One of the most important challenges facing the contemporary scientific world are problems connected with environmental protection. Intensive development of industry and agriculture has led to a rise in living standards on one hand, but an increase in environmental degradation on the other. This degradation poses a direct threat to human health and life. Solving these ever-increasing problems which seriously endanger our civilization require the united efforts of scientists and field researchers of many branches. The "Polish Journal of Environmental Studies" publishes original papers and critical reviews on the following subjects: -Basic and applied environmental pollution research, including environmental engineering -Pollution control of atmospheric, water (marine and fresh), soil and biological materials -Determination of harmful substances, including their metabolic breakdown patterns -Analytical methods for metabolic breakdown patterns or other chemical degradation patterns in the environment and in biological samples -Development of new analytical methods, instruments and techniques for controlling pollutants -Circulation of pollutants in the environment and their effect on living organisms -Environmentally oriented catalysis -Hazards to human health and safety -Waste utilization and management -Land reclamation -Conference reports, scientific and technical reports and book reviews