红外光谱法研究聚苯并咪唑的热降解性能  

Studies on Thermal Degradation of Polybenzimidazole by FTIR

作　　者：浦鸿汀[1] 刘改花[1] 杨正龙[1] 

机构地区：[1]同济大学材料科学与工程学院,上海200092

出　　处：《建筑材料学报》2006年第1期125-128,共4页Journal of Building Materials

基　　金：国家自然科学基金资助项目(50103009);上海市自然科学基金资助项目(05ZR14126)

摘　　要：采用傅立叶变换红外光谱(FTIR),研究了聚[(2,2′-间-苯基)-5,5′-二苯并咪唑](简称聚苯并咪唑,PBI)膜及其磷酸掺杂膜分别在N2、空气氛围中的热降解过程,并与这2种膜的热失重分析结果进行对比.结果发现,在N2中直到450℃时PBI的结构都没有大的变化,而在空气中达450℃时PBI结构发生了变化.从磷酸掺杂PBI膜的FTIR发现,除了PBI结构变化外,磷酸在其中的存在形态也随着温度的升高而变化.在温度升高过程中掺杂体系中的H2PO4-逐渐减少,而H3PO4则逐渐增多.The thermal degradation of polybenzimidazole （PBI） and H3PO4 doped PBI in two different atmospheres （N2 and air） was studied by fourier transform infrared spectroscopy （FTIR）. The results were compared with those of thermal gravimetric analysis of the two samples. It is found that the chemical structure of PBI treated in N2 has no significant change up to 450 ℃, while the structure of the sample treated in air is changed a lot. For H3PO4 doped PBI, the chemical structure of both PBI and H3PO4 is changed with increasing temperature.

关 键 词：聚苯并咪唑 热降解 傅立叶变换红外光谱 热失重分析 

分 类 号：O631.31[理学—高分子化学]