Published : 2023-11-13

The influence of amino chain length and calcium lignosulfonate modification on lignosulfonamides flammability and thermal stability

Abstract

The influence of methods for obtaining lignosulfonyl chloride (through chemical modifications of calcium lignosulfonate) and the amine chain length on the thermal properties and flammability of lignosulfonamides were examined. HCl/HSO3Cl, HCl/PCl5, PCl5, and SOCl2 were used to calcium lignosulfonate modification. The conditions for the synthesis of lignosulfonamides were optimized. Promising results were aquired for N-butyl-N-dodecyl-lignosulfonamides obtained by reaction with thionyl chloride and PCl5. Tests confirmed negligible flammability and better thermal stability. The obtained lignosulfonamides can be used as flame-retardants in biocomposites.



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Majka, T. M. (2023). The influence of amino chain length and calcium lignosulfonate modification on lignosulfonamides flammability and thermal stability. Polimery, 68(10), 544–554. https://doi.org/10.14314/polimery.2023.10.4