首页|Thermal decomposition mechanism of poly(vinyl butyral) with random structure revealed through TG-FTIR-MS, GC-MS, and SVUV PIMS

Thermal decomposition mechanism of poly(vinyl butyral) with random structure revealed through TG-FTIR-MS, GC-MS, and SVUV PIMS

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  • NETL
  • NSTL
  • Elsevier
Understanding thermal decomposition mechanism of polymers with a random structure is essential for both academic research and industrial applications, but remains a complex and less studied area due to its complexity. In this study, we investigated the oxygen-free thermal decomposition behavior of poly(vinyl butyral) (PVB), a polymer with random structure, using a combination of thermogravimetry-Fourier infrared spectroscopy-mass spectrometry (TG-FTIR-MS), gas chromatography-mass spectrometry (GC-MS), and synchrotron vacuum ultraviolet photoionization mass spectrometry (SVUV PIMS). Specific structures of dozens of products and some corresponding free radicals during decomposition were successfully identified and distinguished in detail for the first time. According to the temperature dependent evolution behavior, the products can be categorized into several types: "type A product" (n-butanal), "type B products" (lower aldehydes, lower ketones, alkenals, alke-nones, etc.), and "type C products" (alkenes, butanoic acid, aromatic and cyclic aliphatic compounds, etc.). Their source reactions leading to the formation of each product type were thoroughly discussed respectively. A comprehensive scheme of the thermal decomposition mechanism of PVB was proposed, which cannot be simply classified into any of the three major thermal decomposition categories. Our work provides valuable insights into the thermal decomposition mechanism of PVB and offers a valuable approach for studying the thermal decomposition behavior of other polymers with random structures.

Poly(vinyl butyral)Thermal decomposition mechanismTG-FTIR- MSGC-MSSVUV-PIMSRandom copolymer

Tianyi Chen、Hong Wang、Yushen Yu、Qi Yan、Zhandong Wang、Jun Yang、Liangbin Li、Kunpeng Cui

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Department of Polymer Science and Engineering, State Key Laboratory of Precision and Intelligent Chemistry, Anhui Provincial Engineering Research Center for Advanced Functional Polymer Films, University of Science and Technology of China, Hefei, Anhui 230026, China

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China

State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, China

Anhui Wanwei Advanced Functional Membrane Materials Research Institute Co., Ltd, Hefei, 230026, China

China Zhenhua Group Yunke Electronic Co., Ltd, Guiyang, 550018, China

National Synchrotron Radiation Laboratory, Anhui Provincial Engineering Research Center for Advanced Functional Polymer Films, University of Science and Technology of China, Hefei, Anhui 230029,China

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2025

10.1016/j.polymdegradstab.2025.111373

Polymer degradation and stability

Polymer degradation and stability

SCI
ISSN：0141-3910
年,卷(期)：2025.239(Sep.)
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