Title: LIGNIN A SUSTAINABLE AND RENEWABLE FLAME RETARDANT FOR ABS
Abstract: Lignin is an abundant polyphenol biopolymeric material. Due to its aromatic structure, it develops a char upon fire and it is then a potential candidate to become an efficient flame retardant (FR) in polymeric materials. In this work, lignin was used as flame retardant in acrylonitrile-butadiene-styrene (ABS). Phosphorus is one of the basic constituent of flame retardant and phosphorylation of lignin was carried out to improve its fire-retardant efficiency. The functionalization of kraft lignin (LIG) were done using phosphorus oxide by a simple and industrially feasible process to yield phosphorylated lignin (P-LIG). When incorporated at 30 wt.% in ABS, ABS/LIG and ABS/P-LIG exhibit a significant reduction of the peak of Heat Release Rate (pHRR) measured by cone calorimetry compared to neat ABS. It is shown that PLIG promotes char formation. The char is cohesive and acts as a protective layer.
Authors: Serge Bourbigot, Gaelle Fontaine, Benjamin Prieur, Matthias Wittemann, and Roland Klein
Conference: CAMX 2017 –Orlando