双酚AF型聚芳醚腈的制备及热分解动力学  

Preparation and Thermal Decomposition Kinetics of Bisphenol AF-Polyarylene Ether Nitriles(BPAF-PEN)

作　　者：秦菁 胡鹏 雷雅杰[2] 罗世凯[2] 邓昭平[1] QIN Jing;HU Peng;LEI Yajie;LUO Shikai;DENG Zhaoping(College of Materials and Chemistry and Chemical Engineering,Chengdu University of Technology,Chengdu,Sichuan 610059,China;Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang,Sichuan 621900,China)

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]中国工程物理研究院化工材料研究所,四川绵阳621900

出　　处：《塑料》2020年第6期70-73,共4页Plastics

摘　　要：以六氟双酚A(BPAF)与2,6-二氯苯甲腈(DCBN)为主要原料,采用经典的亲核芳香取代缩聚反应,优化合成与纯化工艺,得到了高纯度双酚AF型聚芳醚腈(BPAF-PEN)树脂粉末,为制备聚芳醚类微孔材料提供了新思路。采用红外光谱和核磁共振氢谱法表征了BPAF-PEN的结构,并通过热失重分析(TGA)研究了BPAF-PEN的热分解动力学。首先利用无模型的Friedman法确定了该热分解反应是一个复杂的过程,活化能约为230~260 k J/mol。采用了基于动力学模型的非线性优化拟合方法揭示了反应机理,得到双酚AF型聚芳醚腈热分解过程可以通过连串反应的动力学模型进行描述,实验值和模拟值的相关系数为0.997。其中,第一步为成核生长反应,第二步为N级反应。Using bisphenol AF and 2.6-dichlorobenzonitrile as main materials,the high purity BPAF-PEN was successfully prepared by classical nucleophile substitution reaction and characterized by FTIR and1 H NMR,providing a new idea for the preparation of Poly(aryl ether)s microcellular materials.The thermal decomposition kinetics of BPAF-PEN was studied by means of TGA.Firstly,we identified the complex reaction by model-free method of Friedman method,and the activation energy was roughly estimated at the range of 230~260 k J/mol.To deeply understand the thermal decomposition mechanism,the kinetic model was created by using nonlinear simulation optimization approach and the experimental and simulation results of mass loss process were compared with high coefficients of 0.997.The results showed that the thermal decomposition process was described by two consecutive reactions.Among them,the first step was nucleation and growth mechanism,and the second step was N-th order reaction.

关 键 词：双酚AF型聚芳醚腈 热失重 无模型法 动力学模型 连串反应 

分 类 号：TQ326.5[化学工程—合成树脂塑料工业]