Study of the thermal degradation of benzene-containing glycerol carbonate derivatives by a combined TG–FTIR and theoretical calculation
作者:Jing Liu、Rujuan Li、Mengya Guo、Hairong Tao、Donglan Sun、Chengxing Zong、Chunjing Liu、Fengzhi Fu
DOI:10.1016/j.tca.2017.05.021
日期:2017.8
the bond dissociation energy for the two compounds indicated that during the pyrolysis process, the CC, CO bonds of five-membered cyclic carbonate fractured preferentially to produce volatile carbonates and CO2, and then the nearby CO bond of esters continued to crack to produce more fragments. Finally, benzene ring still remains in the solid pyrolysis products. Therefore, improving the thermal stability
我们最近发现苯环作为连接块的引入提高了甘油碳酸酯衍生物的热稳定性。为了进一步探索苯的多取代如何影响其热稳定性,另外两种衍生物苯-1,3,5-三羧酸三-(2-氧代-[1,3]二氧戊环-4-基甲基)酯 (BATE1) 和苯-1,2,4,5-四羧酸四-(2-oxo-[1,3]dioxolan-4-ylmethyl)酯 (BATE2) 被合成并通过组合的 TG-FTIR 和理论计算表征。TG 结果显示 BATE1 和 BATE2 都具有三个减肥阶段。逸出气体的 FTIR 光谱和两种化合物的键解离能表明,在热解过程中,五元环状碳酸酯的 CC、CO 键优先断裂,生成挥发性碳酸酯和 CO2,然后附近的酯的 CO 键继续断裂,产生更多的碎片。最后,苯环仍留在固体热解产物中。因此,单纯通过增加苯环上的取代基数不能提高化合物的热稳定性。