文献类型：期刊文献

中文题名：由单TGA曲线评价聚合物热性能的新方法

英文题名：A New Method for Assessing the Thermal Stability of Polymers via Single Heating Rate TGA Curve

作者：陈自强[1];程树军[1];周达飞[1]

机构：[1]华东理工大学材料科学与工程学院,上海200237

年份：2006

卷号：32

期号：4

起止页码：418

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;EI(收录号：2006229913074);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：热失重分析;热性能;动力学;聚合物

外文关键词：thermogravimetry analysis ;thermal property ; kinetics ; polymer

摘要：改进了用单DSC/DTA曲线研究有机物热分解动力学的Borchardt-D an iels方法,将其用于TGA分析,作为聚氨酯丙烯酸酯(PUA)树脂热分解动力学参数计算和热性能评价的方法。选用适当的平滑消噪方法对单TGA曲线数据进行预处理,并用多元线性回归,无须假设分解反应级数,得到热分解反应的一系列动力学常数。由这些参数建立的树脂“使用寿命”的概念,可以半定量地评价树脂的热稳定性,其定性结果和O zaw a-F lynn-W all方法作了对比。由O zaw a-F lynn-W all方法得到PUA的活化能-转化率关系曲线表明,推导该方法的相关假设合理,所选取的计算动力学参数的温度范围可行。算法用M atlab6.5软件实现。
The Borchardt-Daniels method used in thermal kinetics analysis of organic compounds by DSC （differential Scanning Calorimeter ）/DTA （differential thermal analysis） was improved for the kinetic parameter computation and thermal property evaluation of PUA （polyurethane acrylate） resins by TGA （thermogravimetry analysis）. Through pre-treating the TGA data by the carefully selected smoothing/ denoising algorithms and solving the treated TGA data by multiple linear regression, the related kinetic parameters of the PUA in thermal decomposition were obtained without any arbitrary assumption or exploratory computation about the reaction order. The thermal properties of PUA resins were semi-quanti- tatively evaluated by service lifetime defined and computed from the present single TGA-curve methodology. The analysis results are proved to be better than that of Ozawa-Flynn-Wall method. The hypothesis used in the methodology and the temperature limits selected are reasonable and acceptable by the activation energy versus conversion curve computed from the Ozawa Flynn-Wall method. The thermal properties of the PUA resins synthesized are experiments. All of the algorithms were performed on the Matlab 6.5 platform.