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Synthesis of High Purity Benzoxazine Monomer and Prepolymer

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Synthesis of High Purity Benzoxazine Monomer and Prepolymer Via Continuous High-Shear Reactor


This research develops a continuous high-shear reactor adept to synthesize benzoxazine monomers, prepolymers, and alloys thereof, under solvent-free conditions.  Validated by proton NMR, 1H NMR, the continuous high-shear reactor demonstrates throughputs that are 6-40x faster with increased efficacy in reaction kinetics, such as targeting specific monomeric conformations, as compared to current batch and continuous reactor technology. Control of prepolymer conversion is confirmed by DSC analysis.  Furthermore, comparison of purified 1H NMR spectra of monomer synthesized in a batch reactor to the unpurified 1H NMR of monomer synthesized in the aforementioned reactor design, demonstrates that utilization of the continuous high-shear reactor for benzoxazine monomer synthesis yields a high purity product eliminating the need for postprocessing purification.  Synergistically, these attributes significantly increase the throughput, synthetic control, and reduce the cost of melt synthesized benzoxazine monomers and prepolymers using the one-step continuous reactor presented in this work.


Authors: Andrew S. Frazee and Dr. Jeffrey S. Wiggins


Conference: CAMX 2016 – Anaheim


SKU/Code: TP16-0129


Pages: 8

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