About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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2022 Undergraduate Student Poster Contest
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Presentation Title |
Impact of Itaconic Acid on the Stabilization Reaction of Poly(Acrylonitrile-co-Itaconic Acid) as Examined Using Solid-State NMR Under Air and Vacuum Conditions
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Author(s) |
Jack E. Beardshear, Jiayang Ma, Toshikazu Miyoshi |
On-Site Speaker (Planned) |
Jack E. Beardshear |
Abstract Scope |
This project investigates the impact of Itaconic Acid comonomers on the stabilization chemical reaction of Poly(acrylonitrile-co-itaconic acid) (PAI) for the production of high performance carbon fiber. 30 wt% 13C full labeled samples of PAI 3 wt% IA were reacted under both air and vacuum conditions, at five reaction temperatures. Additionally, the reaction was analyzed using Differential Scanning Calorimetry (DSC). By using Solid State (ss) one dimensional (1D) Direct Polarization Magic Angle Spinning (DP/MAS) 13C NMR and two dimensional (2D) 13C-13C INADEQUATE NMR, detailed chemical structures of stabilized PAI were obtained. These NMR spectra reveal a novel cyclized intermediary structure formed by IA comonomers, and provide a more detailed description of the structural evolution of PAI. DSC analysis and NMR results also confirm that the presence of oxygen plays a vital role in the formation of the desirable aromatic ladder structure through the promotion of dehydrogenation reactions. |