聚氯乙烯抽纱台布热分解及耐热寿命研究

Study on the Thermal Decomposition and the Thermal Lifetime of Polychloroethylene Tablecloth

该文应用热重法（ＴＧ）和微分热重法（ＤＴＧ）研究了聚氯乙烯（ＰＶＣ）抽纱加香台布热分解反应。ＴＧ曲线表明热分解过程分三步完成。表观活化能计算结果分别为Ｅ１＝８４．３０ｋＪ·ｍｏｌ（－１）；Ｅ２＝１３９．５６ｋＪ·ｍｏｌ（－１）；Ｅ３＝３０５．２０ｋＪ·ｍｏｌ（－１）。热寿命议程为。用热分析技术求解高分子材料动力学参数甚为方便，可在短时间内取得有价值的资料，是研究高聚物热稳定性的有效实验手段．

In this paper, we studied the thermal decomposition process of polychloroethylene Tablecloth using thermogravimetric analysis method (TG)and differential thermogravimetric analysis method(DTG). It is showed from TG curres that the thermal decomposition includes three steps. The calculated results of apparent reactive energies are E1= 84. 30 kJ·mol(-1); E2 = 139. 56 kJ·mol(-1) ; E3 = 305. 20 kJ·mol(-1) respectively.The thermal lifetime formular is as belowlgτ= 5. 112×103·(1/T) - 10. 515We found that determination of the kinetic parameters of high polymers can be easily and conveniently carried out by the use of thermal analysis technique. It might be an efficacious method for studying the stability of high polymers.