Kinetics of thermal and photo-initiated release of tris (1-chloro-2-propyl) phosphate (TCPP) from polyurethane foam materials

Thermal and photo initiated release of tris(1-chloro-2-propyl) phosphate (TCPP) from different polyurethane foam materials were studied using a validated GC-MS method with a linear range of 0.34-680 g/ml. The release of TCPP from two foam types was reported and was found to follow first order kinetics with rate constants directly related to the ageing conditions and radiation intensity. Rate constants for TCPP release from UV radiated samples were found to be higher than those for thermally aged ones. Migration of TCPP from different foam sample types into the contacting body was also recorded and was found to get enhanced by thermal and UV ageing of the foam samples. The presence of biological fluids was also found to enhance the migration rate. Our results reveal that UV radiation significantly affects the weak interaction between TCPP and the polyurethane material which reflects the relatively high rate constant and larger uptake.