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The structural changes occurring to hardwood Alcell™ lignin as a result of fiber devolatilization/extrusion, oxidative thermo-stabilization and carbonization are investigated in this study by solid-state and solution nuclear magnetic resonance (NMR) spectroscopy techniques. Solution based 1 H– 13 C correlation NMR of the un-spun Alcell™ lignin powder and extruded lignin fiber detected...
Bio-based polyfurfuryl alcohol (PFA) matrix nanocomposites were fabricated by in situ polymerization of furfuryl alcohol (FA) using (natural or organomodified) montmorillonite nanoclays (MMT) or cellulose whiskers (CW) as catalysts and as matrix modifiers, providing enhanced thermal performance. FTIR analysis shows the catalyst-dependent formation of gamma-diketones that are generated from hydrolytic...
The weak physical gelation of cellulose acetate propionate–butyl butyrate solutions as a result of the in-situ decomposition of iron pentacarbonyl complexes was explored. Viscometry and infrared spectroscopy were used to monitor the iron pentacarbonyl decomposition reaction progress and its effect on viscosity. Changes in viscosity in of the cellulosic fluids in general and gelation in particular...
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