TG-FTIR联用技术研究聚甲基乙撑环己撑碳酸酯的热降解行为  

Thermal decomposition behaviour of PPCHCs by thermogravimetric analysis/infrared spectroscopy(TG-FTIR)

作　　者：邹颖楠[1] 黄国家 杨梅[1] 

机构地区：[1]广东食品药品职业学院化妆品科学系,广州510520 [2]中山大学能源与环境材料研究所,广州510275

出　　处：《河北工业大学学报》2013年第6期61-67,共7页Journal of Hebei University of Technology

基　　金：广东食品药品职业学院自然科学基金(2012YZ003)

摘　　要：通过热失重-红外光谱(TG-FTIR)联用分析技术对三元聚合物聚甲基乙撑环己撑碳酸酯(PPCHC)进行裂解,并用红外光谱分析裂解产物,在线分析聚合物加热过程中的变化.结果表明催化剂的存在不改变聚合物的热降解机理,降解过程中无规断链与解拉链几乎是同时发生的,产物为环状碳酸和1,2-丙二醇.同时,对环己撑(CHO)摩尔分数分别为1.3%和6.7%的PPCHC进行了热裂解动力学的研究,结果表明高CHO含量的PPCHC的解聚反应需要较高的温度引发,具有相对较好的热稳定性.The thermal decomposition behavior of poly(propylene cyclohexene carbonate) s(PPCHCs) was studied by thermogravimetric analysis/infrared spectroscopy(TG-FTIR). The results showed the absence and presence of a metal complex catalyst in the terpolymer had little effect on the thermal decomposition of the PPCHC. PPCHC in the absence and presence both underwent a one-stage pyrolysis, viz. main chain random scission and unzipping reaction took place at the same time. The final pyrolysates were cyclic propylene carbonate and 1,2 propanediol. The dynamic decomposing process of PPCHCs with various CHO content(1.3% and 6.7%) was explored with TG. The results showed that the thermal decomposition of PPCHC with lower CHO content occurred at lower temperature than that of PPCHC with higher CHO content. The decomposition of the more CHO content occurred at high temperature and showed high thermal stability.

关 键 词：三元共聚物 聚甲基乙撑环己撑碳酸酯 TG-FTIR联用 热降解 热稳定性 

分 类 号：T-55[一般工业技术]