Diethyl ketone triperoxide: thermal decomposition reaction in chlorobenzene solution and its application as initiator of polymerization
作者:Adriana I. Cañizo、Gladys N. Eyler、Graciela Morales、Jorge R. Cerna
DOI:10.1002/poc.716
日期:2004.3
The kinetics of the thermal decomposition reaction of diethyl ketone triperoxide (3,3,6,6,9,9-hexaethyl-1,2,4,5,7,8-hexaoxacyclononane, DEKT) in chlorobenzene solution were studied in the temperature range 99.0–148.0°C and at initial concentrations of (1.65–4.97) × 10−2M. The thermolysis of DEKT follows a first-order kinetic law up to at least ca 80% triperoxide conversion. The activation parameter
在温度下研究了三乙基二氧三酮(3,3,6,6,9,9-六乙基-1,2,4,5,7,8-六氧杂环戊烷,DEKT)在氯苯溶液中的热分解反应动力学。初始温度为(1.65-4.97)×10 -2 M时,温度范围为99.0–148.0°C 。DEKT的热分解遵循一阶动力学定律,至少达到约80%的三氧化二氧转化率。氯苯中初始O-O键断裂的活化参数值(ΔH ‡= 134.6±1.7 kJ mol -1 ; ΔS ‡= 4.2±3.8 J mol -1 K -1)和观察到的反应产物支持逐步反应机理,该机理包括第一步,将DEKT分子的一个过氧化键进行单分子均质裂解,生成双自由基作为中间体。此外,将所得结果与在甲苯,甲苯-苯乙烯(50%,v / v)和氯苯-苯乙烯(50%,v / v)溶液中获得的结果进行了比较,表明分解反应强烈依赖于溶剂。此外,将在所有情况下获得的双自由基中间体用于引发苯乙烯聚合。已经证明