'New tailor-made biopolymers produced from lignocellulosic sugars waste for highly demanding fire-resistant applications'

TECHNICAL ARTICLE
Chemical modification of lignin by phosphorus molecules to improve the fire behavior of polybutylene succinate

Publication date: Available online 24 December 2014
Source:Polymer Degradation and Stability

Author(s): L. Ferry , G. Dorez , A. Taguet , B. Otazaghine , J.M. Lopez-Cuesta

Lignin was used as flame retardant for polybutylene succinate (PBS) biopolyester. Lignin was first demonstrated to weakly contribute to material flammability due to a high charring ability and a low heat release when burning. Alkali lignin was proved to be more interesting than organosolv lignin due to the release of sulfur dioxide during decomposition. When incorporated at a 20%wt loading in PBS, alkali lignin significantly reduces pHRR and promotes a thick charring behavior. Alkali lignin was successfully surface modified by grafting molecular or macromolecular phosphorous compounds. When blended with PBS, modified lignin was highlighted to further increase the barrier effect. Char promotion is accelerated and the resulting charred layer exhibits a higher cohesivity. Modified lignin appears as an interesting biobased flame retardant component.





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This project has received funding from the European Unionís Seventh Framework Programme for research, technological development and demonstration