CO_2-环氧丙烷-邻苯二甲酸酐共聚物的合成及热性能

Synthesis and thermal properties for terpolymer of CO_2-epoxy propane-phthalic anhydride

利用Zn-Fe(III)双金属催化剂(DMC)催化合成了CO2、环氧丙烷(PO)和邻苯二甲酸酐(PA)三元共聚物(PPCPA)。研究结果表明:PA参与了三元共聚反应,并且共聚物中CO2的含量为54.27%;PPCPA的降解分2个阶段进行,在升温速率分别为5、10、15、20 K/min的条件下,其第1阶段最快降解温度分别为240.9、256.3、264.1、268.3℃,第2阶段最快降解温度分别为309.9、319.6、325.8、328.5℃;通过Kissinger方程可计算出PPCPA热降解反应动力学参数,其第1阶段、第2阶段热降解反应表观活化能分别为105.801、201.907 kJ/mol,指前因子分别为1.319×1010、1.574×109min-1。

The PPCPA[terpolymer of CO2, epoxy propane （PO） and phthalic anhydride （PA）] was synthesized by DMC[Zn-Fe （III） bimetallic catalyst]. The research results showed that the PA was involved in the ternary copolymerizatio, and the CO2 content in terpolymer was 54.27%. the PPCPA had two stages of degradation, the fastest degradation temperatures of the first stage were 240.9,256.3,264.1,268.3 ℃ respectively, and the fastest degradation temperatures of the second stage were 309.9,319.6,325.8,328.5 ℃ respectively when the heating speeds were 5, 10, 15,20 K/rain respectively. The PPCPA＇ s kinetics parameters at thermal degradation could be calculated by Kissinger equation, its apparent activation energies at thermal degradation of the first, second stages were 105.801,201.907 kJ/mol respectively, and its pre-exponential factors at thermal degradation of the first, second stages were 1.319×10m, 1.574×109 min^-1 respectively.