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用O,O-二乙基-O-烯丙基硫代磷酸酯(DATP)与丙烯腈共聚合成了新型阻燃聚丙烯腈共聚物(FR-PAN),对其在空气中的非等温动力学通过TG-DTG技术进行了研究,并通过极限氧指数法(LOI)考查了FR-PAN的阻燃性能;利用Kissinger方法和Flynn-Wall-Ozawa(FWO)方法计算出了FR-PAN热降解过程中的表观活化能;采用Satava-Sestak方法通过对不同机理模型的选取,确定了FR-PAN的热降解机理.结果表明,由Kissinger法和FWO法所计算得到的FR-PAN的表观活化能分别为119.62和123.99 kJ·mol-1;FR-PAN的热降解反应属于随机成核和随后增长机理,其机理函数为G(α)=-ln(1-α),反应级数n=1.
A novel flame retardant polyacrylonitrile copolymer (FR-PAN) was synthesized by the copolymerization of O, O-diethyl-O-allylphosphorothioate (DATP) and acrylonitrile on its non-isothermal dynamic in the air The TG-DTG technique was used to study the flame retardancy of FR-PAN. The Kissinger method and Flynn-Wall-Ozawa (FWO) method were used to calculate the thermal degradation of FR-PAN The apparent activation energy of the FR-PAN was determined.The thermal degradation mechanism of FR-PAN was determined by Satava-Sestak method through the selection of different mechanism models.The results show that the apparent FR-PAN apparent by Kissinger method and FWO method The activation energies are 119.62 and 123.99 kJ · mol-1, respectively. The thermal degradation reaction of FR-PAN belongs to the random nucleation and subsequent growth mechanism. The mechanism function is G (α) = - ln (1-α) = 1.