Effect of a Chitosan-based Flame Retardant with a Caged Structure on Unsaturated Polyester Resin

Published: 8 November 2021| Version 1 | DOI: 10.17632/zfrsrrv598.1


A chitosan-based flame retardant with a caged structure of chitosan maleic acid mono (1-thio-phosa-4-hydroxymethyl-2,6,7-trioxa-bicyclic [2.2.2] octan-4-methylene) ester salt (CS-MA-SPEPA) is successfully synthesized well-characterized. The Cone Calorimeter (CC) results reveal the introduction of CS-MA-SPEPA into UPR matrix effectively reduce the HRR, TRR and SPR. More importantly, the incorporation of CS-MA-SPEPA suppresses the release of toxic gases (CO) from UPR matrix. The char residues results suggest the combination of CS-MA-SPEPA into UPR increase the degree of graphitization of the matrix and made char residues intumescent and tight, which could efficiently block the exchange of oxygen and heat.



Resin, Chitosan, Flame Retardant