%0 Journal Article
%T The impact of sulfur oxidation level on flame retardancy
%A Bob A Howell
%A Yoseph G Daniel
%J Journal of Fire Sciences
%@ 1530-8049
%D 2018
%R 10.1177/0734904118806155
%X Compounds containing sulfur in various forms may be used as flame retardants or as adjuvants to promote the activity of other flame-retarding elements, most notably phosphorus. To gain a better understanding of the nature of the sulfur moiety in a flame retardant on performance, a series of phosphorus esters derived from isosorbide containing sulfur at various levels of oxygenation (sulfide, sulfoxide, sulfone) have been prepared and evaluated for flame-retardant impact in diglycidyl ether of bis-phenol A epoxy. In all cases, the presence of sulfur positively impacts flame retardancy. In general, the impact on flame retardancy increases as the level of oxygenation at sulfur increases (sulfone£¿>£¿sulfoxide£¿>£¿sulfide)
%K Flame retardants from renewable biosources
%K sulfur-promoted flame retardancy
%K phosphorus flame retardants
%K phosphorus esters
%K isosorbide derivatives.
%U https://journals.sagepub.com/doi/full/10.1177/0734904118806155