聚乙二醇/二醋酸纤维素相变材料非等温固-固相变动力学
Nonisothermal Kinetics of Solid-Solid Phase Transition in Polyethylene Glycol/Diacetate Cellulose Phase Change Materials
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摘要: 通过溶液共混的方法制得聚乙二醇(PEG)/二醋酸纤维素(CDA)的相变材料具有固-固相转变性质.分别对聚乙二醇及4种相变材料进行不同速率下的非等温DSC测试.采用Kissinger和Ozawa两种动力学模型研究了非等温固-固相变动力学.计算了固-固相变过程的活化能和反应级数.结果表明,两种方法求得的表观活化能Ea值一致.Abstract: Polyethylene glycol(PEG)/diacetate cellulose(CDA) phase change materials were prepared by blending PEG and CDA.Nonisothermal kinetics of solid-solid phase change transitions in PEG/CDA materials were investigated by DSC.Kissinger and Ozawa methods were applied to determine the activation energy(Ea) and reaction order of solid-solid transitions.Results obtained by the two methods were found to be in agreement.
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