含氰基聚酰亚胺薄膜的制备及其热分解动力学  

Preparation and thermal pyrolysis kinetics of cyano-containing polyimide film

作　　者：杨桃蓉[1] 牛彦存 邱凯[1] 张俊伟[1] 曾科[1] 杨刚[1] 

机构地区：[1]四川大学高分子科学与工程学院,高分子材料工程国家重点实验室,四川省成都市610065

出　　处：《合成树脂及塑料》2014年第5期23-27,共5页China Synthetic Resin and Plastics

摘　　要：以4-[3,5-双（4-氨基苯氧基）苯氧基]邻苯二甲腈和3,3′,4,4′-联苯四甲酸二酐为原料，经聚酰胺酸热酰亚胺化制备含氰基的聚酰亚胺（CN-BP-PI）薄膜。采用傅里叶变换红外光谱、热重分析、差示扫描量热法对CN-BP-PI薄膜进行了分析。采用动态热重法研究了CN-BP-PI的分解动力学，用积分法结合常见固相热分解反应动力学函数来判断热分解的动力学函数。由Ozawa，KAS，Kissinger，Achar，Coats-Redfern，MacCallum-Tanner，vanKrevelen方程求热分解反应的动力学参数。转化率为0.2~0.8时所得CN-BP-PI在氮气中热分解反应的表观活化能为119.68~215.61kJ/mol，平均活化能为136.35kJ/mol，指前因子平均值为8.52＆#215;107s-1。Polyimide film containing phthalonitrile groups （CN-BP-PI） was prepared by thermal imidization of polyamic acid with 4-（3,5-bis（4-aminophenoxy） phenoxy） phthalonitrile （CNDA） and 3,3′,4,4′-biphenyl dianhydride （BPDA） as raw materials. The film was studied by Fourier transform infrared spectroscopy （FTIR）, thermogravimetry （TG） and differential scanning calorimetry （DSC）. The decomposition kinetics of CN-BP-PI was researched by dynamic TG, and the kinetic functions of the thermal decomposition were determined by integral method in combination with kinetic functions of common solid-phase thermal pyrolysis. The kinetic parameters of the thermal decomposition reaction were obtained by Ozawa, KAS, Kissinger, Achar, Coats-Redfern, MacCallum-Tanner and van Krevelen equations. The apparent activation energy of the thermal pyrolysis reaction of CN-BP-PI was 119.68-215.61 kJ/mol when the conversion was 0.2-0.8 in N2 atmosphere, so the average activation energy was 136.35 kJ/mol and the average of the pre-exponential factor A was 8.52＆#215;107 s-1.

关 键 词：聚酰亚胺 邻苯二甲腈基团 热重分析 分解动力学 动力学参数 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业]