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: Teixeira Marie, Sonnier Rodolphe, Otazaghine Belkacem, Ferry Laurent, Aubert Melanie, Tirri Teija, Wilen Carl-Eric, Rouif Sophie
Publisher: Elsevier
Publication year: 2018
Journal: Radiation Physics and Chemistry
Volume number: 145
Start page: 135
End page: 142


Abstract

Three unsatd. compds. bearing resp. 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 mols. were investigated by wt. measurements and SEM-​EDX observations. Flammability and esp. self-​extinguishment were assessed by thermogravimetric anal., 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 contg. 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 mols. have not been grafted upon irradn. Moreover, the combination of these mols. prevents the radiation-​grafting of other mols. which showed good grafting rate when used alone.


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