Radiation-grafting of flame retardants on flax fabrics - A comparison between different flame retardant structures

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Marie Teixeiraa, Rodolphe Sonniera, Belkacem Otazaghinea, Laurent Ferry, Mélanie Aubertb, TeijaTirrib, Carl-Eric Wilén, Sophie Rouifc
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication year: 2018
Journal: Radiation Physics and Chemistry
Journal acronym: RADIAT PHYS CHEM
Volume number: 145
Start page: 135
End page: 142
Number of pages: 8
ISSN: 0969-806X


Abstract

Three unsaturated compounds bearing respectively phosphate, aryl bromide and sulfenamide moieties were used as flame retardants (FR) for flax fabrics. Due to the presence of carbon-carbon double bonds, radiation grafting was considered to covalently bond these FR onto fiber structure. Grafting efficiency and location of FR molecules were investigated by weight measurements and SEM-EDX observations. Flammability and especially self-extinguishment were assessed by thermogravimetric analysis, pyrolysis-combustion flow calorimetry and a non-standardized fire test already used in previous studies. All FRs were able to diffuse into elementary fiber bulk. Nevertheless only the phosphonated monomer (noted FR-P) was significantly grafted onto flax. Self-extinguishment was obtained for fabrics containing at least around 0.5 wt% of phosphorus. On the contrary the FR content of flax fibers after radiation-grafting procedure and washing was negligible for FR-S and FR-Br, evidencing that these molecules have not been grafted upon irradiation. Moreover, the combination of these molecules prevents the radiation-grafting of other molecules which showed good grafting rate when used alone.


Keywords

Flame retardancy, Flax fibers, Radiation-grafting

Last updated on 2019-19-06 at 04:45