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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sipilä, Jussi
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2023Exploring Alkyl-O-Alkyl Ether Structures in Softwood Milled Wood Ligninscitations
- 2020Fungal Treatment Modifies Kraft Lignin for Lignin- and Cellulose-Based Carbon Fiber Precursorscitations
- 2020Applicability of Recombinant Laccases From the White-Rot Fungus Obba rivulosa for Mediator-Promoted Oxidation of Biorefinery Lignin at Low pHcitations
- 2016Effect of Fatty Acid Esterification on the Thermal Properties of Softwood Kraft Lignincitations
- 2014Phenolic mediators enhance the manganese peroxidase catalyzed oxidation of recalcitrant lignin model compounds and synthetic lignincitations
- 2011Oxidation of lignans and lignin model compounds by laccase in aqueous solvent systemscitations
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article
Effect of Fatty Acid Esterification on the Thermal Properties of Softwood Kraft Lignin
Abstract
<p>Esterification of kraft lignin inherently addresses its potential for thermoplastic applications either on its own or as a component of polymer blends. In this effort, we have investigated the selectivity of softwood kraft lignin toward esterification via acylation. LignoBoost kraft lignin was esterified with acetyl (C<sub>2</sub>), octanoyl (C<sub>8</sub>), lauroyl (C<sub>12</sub>), and palmitoyl (C<sub>16</sub>) chlorides at various molar ratios with respect to the total hydroxyls present. Quantitative <sup>31</sup>P NMR spectroscopy, Fourier transform infrared spectroscopy (FTIR), and gel permeation chromatography (GPC) were used to evaluate the selectivity and efficiency of these reactions on the various hydroxyl groups present. The C<sub>8</sub>-C<sub>16</sub> acyl chlorides showed distinct enhanced reactivity toward the aliphatic hydroxyl groups, whereas C<sub>2</sub> acyl chloride was found to react uniformly with any available OH irrespective of their chemical nature. The effects of long chain acylation on the polymer and material properties were also examined using solution viscosity, thermal, and rheological measurements. Polymer blends were also produced and studied by melt extrusion. The long aliphatic chains when installed on the lignin displayed peculiar association effects in solution and enhanced the melt flow characteristics of the lignin-polymer blends.</p>