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Updated: Jul 15, 2025

Author Spotlight: Advances in Nanoscale Infrared Spectroscopy to Explore Multiphase Polymeric Systems
Published on: June 23, 2023
Application of multi-channel in situ infrared spectroscopy: the case of PVB thermal aging
Chun Xu1,2, Shuen Liang2, Bo Jin1
1State Key Laboratory of Environment-friendly Energy Material, School of Materials Science and Engineering, Southwest University of Science and Technology Mianyang 621010 China.
Abstract:
Thermal kinetic parameters are important for establishing the relationship between the aging process, time, and temperature, which would help predict the thermal aging lifetime and stability in the application of polymer materials. We developed a multi-channel in situ detecting device, which provided an efficient method for IR spectrum measurement. The thermal aging process of polyvinyl butyral (PVB) at several constant temperatures (100 °C, 110 °C, 120 °C, 135 °C, and 150 °C) had been studied by the multi-channel in situ infrared reaction device. The kinetic parameters (Eα) were calculated from the absorbance intensity of -C-O-, -C[double bond, length as m-dash]O, -CH3, and -OH. The -OH proved to be the active site of PVB during thermal aging, and a possible thermal aging mechanism of PVB was proposed. We proved the method using a combination of a multi-channel in situ reaction device and FTIR was suitable to study the aging mechanism and kinetics of polymers.
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