Influence of dimethyl sulfoxide on exothermic decomposition of peroxide-containing tetrahydrofuran

Tetrahydrofuran (THF), which is known for being susceptible to autoxidation, is often used with DMSO as a solvent mixture. In the present study, the authors investigated the influence of DMSO on the exothermic decomposition of peroxide containing THF, which may lead to an accidental explosion. THF was pressurised by O2 and kept at a fixed temperature to produce peroxide. Spectroscopic analysis and iodometric titration showed that THF sample contains various peroxides and decomposition products. Thermal analysis with differential scanning calorimetry revealed that the time to exothermic decomposition of THF peroxide is shortened in the presence of DMSO. The activation energy, which was calculated on the assumption that the mechanism of the reaction does not vary depending on temperature, was found to decrease by mixing with DMSO. This result agrees with the fact that the time to exothermic decomposition of peroxide is shortened in the presence of DMSO.

Authors: Ooizumi, Noriko; Yoshino, Satoru; Kumasaki, Mieko; Miyake, Atsumi ;Full Source: Science and Technology of Energetic Materials 2011, 72(4), 111-115 (Eng) ;