GAP和GAP/B的红外光谱和热分析研究  

FTIR and Thermal Analysis Study of GAP and GAP/B

作　　者：王天放[1] 孙运兰[1] 李疏芬[1] 

机构地区：[1]中国科学技术大学化学物理系,安徽合肥230026

出　　处：《光谱学与光谱分析》2006年第6期1022-1025,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(50176047)资助项目

摘　　要：采用傅里叶红外光谱测试（FTIR）、热重法（TG）和微商热重法（DTG）研究了GAP和GAP处理硼的样品（GAP／B）在空气和氮气两种环境中的热分解。结果表明：GAP在约170℃开始发生叠氮基消除反应，250℃左右结束，GAP骨架的解聚反应延后了40℃左右；硼（B）改变了GAP的热分解过程，GAP／B在55-70℃开始分解，明显提前于GAP本身，而且，叠氮基的消除反应与GAP骨架的解聚反应几乎同时发生。基于Kissinger热分析数据处理方法，对GAP和GAP／B两种体系在叠氮基消除阶段的热分解动力学进行了研究，结果发现在空气环境中，两种体系的活化能E的数值均较低，较易于发生反应，这是由于GAP与空气中的氧发生有氧热解所致。The thermal decomposition of GAP and GAP/B in air and nitrogen were studied by FTIR and TG-DTG. The analysis by FTIR and TG-DTG shows that the azide group elimination reactions of GAP begin at about 170℃ and finish around 250℃, and the depolymerization of GAP delays by 40℃ ; Boron changes the mechanism of thermal decomposition process of GAP, and the results show that GAP/B starts losing mass between 55 and 70℃, which is much earlier than GAP itself does. Furthermore, the depolymerization of GAP almost takes place at the same temperature with the azide group elimination. Some kinetics parameters of the reactions were calculated based on Kissinger＇s processing methods. The results show that the activation energies of the thermal decomposition of GAP and GAP/B are lower and the reactions are easier to occur under air. The possible reason is that the oxygen containing thermal decomposition of GAP has happened.

关 键 词：GAP 硼 包覆 傅里叶变换红外光谱 热分解动力学 

分 类 号：O633.1[理学—高分子化学]