中文摘要：

采用热失重（TG）非等温法研究了4，4’-二氨基二苯醚（0DA）与4，4＇-六氟亚异丙基-邻苯二甲酸酐（6FDA）合成的聚酰胺酸（PPA）在整个亚胺化温度范围内的动力学。依据不同升温速率等温法结合23种机理函数推到出亚胺化反应的机理函数：g（a）=（1-a）^-1-1利用迭代的等转化率法得到了活化能Ea的平均值为94．64kJ／mol，由此得到指前因子A的范围为9．05×10^7～2．62×10^13s^-1。

英文摘要：

Non-isothermal TG method was used to study the imidization kinetics of the polyamic-acid synthesized by 4,4＇-oxydianiline and 4,4-hexafluoroisoprorylidene-diphtha anhydride in the whole scope of imidization temperature. The multiple rates isotemperature with 23 types of mechanism function is proposed to define the most probable mechanism g（a）= （l-a）^-1 -1 ;The average activation energy E, is calculated by the iterative isoconversional procedure, which is 94.64kJ/mol; so the pre-exponential A is 99.05×10^7～2.62×10^13s^-1.