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6 August 2023 Study on curing kinetics of PBT/TDI/TPB based on in-situ FT-IR
Shiyou Qin, Xinhai Yu, Haoshu Liu
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Proceedings Volume 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023); 127811B (2023) https://doi.org/10.1117/12.2687191
Event: 2023 International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 2023, Guangzhou, JS, China
Abstract
This work established an in-situ Fourier transform infrared spectroscopy (FT-IR) using two-slice extrusion. The reaction kinetics of three, three-diazymoxy-tetrahydrofuran copolymer (PBT)/ two, four-Toluene Diisocyanate (TDI)/ Triphenyl Bismuth (TPB) system was studied and compared with that of PBT/TDI system. Compared with in situ Raman spectroscopy, in-situ FT-IR could obtain the evolution of functional groups during the curing reaction more accurately. The reaction of PBT/TDI could be divided into two stages, whose reaction kinetics accorded with second-order reaction kinetics. The addition of TPB hardly changed the order of reaction kinetics of the PBT/TDI system. TPB roughly doubled the second-stage reaction rate constant. This study provides an in-situ experimental method and the corresponding reaction kinetics crucial to investigating propellants.
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Shiyou Qin, Xinhai Yu, and Haoshu Liu "Study on curing kinetics of PBT/TDI/TPB based on in-situ FT-IR", Proc. SPIE 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 127811B (6 August 2023); https://doi.org/10.1117/12.2687191
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KEYWORDS
FT-IR spectroscopy
Raman spectroscopy
Coating
Activation energy
Infrared spectroscopy
Spectroscopy
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