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聚乙烯降解与热解的分析与数值模拟：用热重法测量老化

Analytical and Numerical Modeling of Degradation and Pyrolysis of Polyethylene: Measuring Aging with Thermogravimetry.

作者信息

Verho Tuukka, Vaari Jukka

机构信息

VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, FI-02044 Espoo, Finland.

出版信息

Polymers (Basel). 2022 Jul 1;14(13):2709. doi: 10.3390/polym14132709.

DOI:10.3390/polym14132709
PMID:35808753
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9268922/
Abstract

Aging reactions due to heat and radiation cause chain scissions and cross-linking in cross-linked polyethylene (XLPE). We have developed theoretical and numerical graph models to study the evolution of the gel fraction and network properties during aging as well as the mass loss during thermogravimetric analysis (TGA). Our analytical and kinetic Monte Carlo (KMC) based models that combine degradation reactions and a simple vaporization model can quantitatively predict TGA curves for aged XLPE. Fitting the model to experimental TGA data yields the number of scission reactions, showing that thermogravimetry combined with our models can present a nondestructive aging characterization tool for lifetime prediction.

摘要

由热和辐射引起的老化反应会导致交联聚乙烯（XLPE）发生断链和交联。我们已经开发了理论和数值图形模型，以研究老化过程中凝胶分数和网络性质的演变，以及热重分析（TGA）过程中的质量损失。我们基于分析和动力学蒙特卡罗（KMC）的模型结合了降解反应和简单的汽化模型，可以定量预测老化XLPE的TGA曲线。将模型与实验TGA数据拟合可得出断链反应的数量，表明热重分析与我们的模型相结合可以提供一种用于寿命预测的无损老化表征工具。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/bf394ab8bc48/polymers-14-02709-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/04126c5ef5d6/polymers-14-02709-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/02170dd6d115/polymers-14-02709-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/3a749987c9a2/polymers-14-02709-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/61cdb7ee81c0/polymers-14-02709-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/4d40ac6790ca/polymers-14-02709-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/bf394ab8bc48/polymers-14-02709-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/04126c5ef5d6/polymers-14-02709-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/02170dd6d115/polymers-14-02709-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/3a749987c9a2/polymers-14-02709-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/61cdb7ee81c0/polymers-14-02709-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/4d40ac6790ca/polymers-14-02709-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3449/9268922/bf394ab8bc48/polymers-14-02709-g006.jpg

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本文引用的文献

1
Kinetic Monte Carlo simulation of the photodegradation process of polyester-urethane coatings.聚酯-聚氨酯涂层光降解过程的动力学蒙特卡罗模拟
Phys Chem Chem Phys. 2015 Aug 14;17(30):19962-76. doi: 10.1039/c5cp01581b.
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Pyrolysis pathways of sulfonated polyethylene, an alternative carbon fiber precursor.磺化聚乙烯的热解途径，一种替代碳纤维前体。
J Am Chem Soc. 2013 Apr 24;135(16):6130-41. doi: 10.1021/ja3121845. Epub 2013 Apr 15.