用小型密闭压力容器试验(MCPVT)跟踪测定了有机过氧化物热分解反应产生的压力行为和有稀释稳定剂存在下的压力效应.结果表明,非挥发性稀释稳定剂能降低热分解产生的最大压力(Pmax),挥发性稀释稳定剂使Pmax值增大,且稀释稳定剂显著减少最大压力变化值(dP/dt)max,即显著降低热分解速度.并利用(dP/dt)max值和K=(dP/dt)maxD/(dP/dt)max值评价了稀释稳定剂的热分解稳定效果,稀释稳定剂降低热分解危险等级,K的大小顺序为:BPO-H2O<DCP-CaCO3<DTBP-IPS<TBPB-IPS,当有机过氧化物的质量分数为60%时,BPO、DCP、DTBP和TBPB的K值分别为0.748 2、0.316 1、0.242 3和0.182 7.
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