Kinetics of the release of antimony trioxide from the backcoated textile preparation

Abstract

Segregation of antimony trioxide (ATO) from back-coated textiles was studied for two types of textile samples: A (ATO-Hexabromocyclododecane) and B (ATO-Decabromodiphenyl ether). Samples A was found to lose 5.3, 12, 28 and 39 %wt:wt of the amount of ATO originally present due to thermal ageing and UV exposure, respectively. Thermal ageing was performed at 25, 60 and 90 °C compared to 11.0, 17.3, 26.0 and 20.4 % wt:wt of ATO for sample B. The release follows first order kinetics with rate constants of 7.59×10 -3 , 1.89×10 -2 , 4.80×10 -2 and 2.60×10 -2 day -1 , respectively, for type A and 9.20×10 -3 , 2.06×10 -2 , 4.10×10 -2 and 3.83×10 -2 day -1 for type B aged at 25, 60, 90 °C and UV exposure, respectively. Migration of ATO from the backcoated textile into simulated biological fluids was also studied for different type of samples under different ageing conditions using Head-over-Heels and contact blotting tests. The presence of biological fluids enhances the migration of ATO.

Kinetics of Thermal and Photo-Initiated Release of Tris ( 1-Chloro-2-Propyl ) Phosphate ( TCPP ) from Polyurethane Foam Materials

“…[7,18] Both temperature and UV radiation were found to have a strong effect on the TCPP-polyurethane interaction and it is believed that these factors affect the rate of release of TCPP from foam samples. [4][5][6][19][20][21] Moreover, it is also believed that the presence of fluids accelerates the migration rate of TCPP from the foam material and consequently enhance its absorption by humans. [12,13] In fact, little is known about the mechanisms of migration of TCPP from the foam samples or about the rate and mechanism of its release from the foam material.…”

“…[21] In this paper, we continue our efforts to address the issue of the release of organophosphate flame retardants studying hereby the thermal and photo initiated release of TCPP from polyurethane foam samples as well as its leaching into biological fluids. [4][5][6][19][20][21] Kinetic results of the thermal and photo-initiated release of TDCP organophosphate flame retardants from polyurethane foam materials was reported in another publication. [14] The main objective of this paper is to (1) study the rate of release of TCPP from foam samples, (2) study the effect of thermal and UV radiation on the rate of release and (3) investigate the influence of the presence of biological fluids on the release rate and mechanism.…”