【摘要】 应用DSC方法和经典的高分子共混物经验方程估算了纤维素/聚乙二醇共混物的玻璃化转变温度(Tg),并研究了Tg与两组分比例之间的关系。结果显示:该共混物的Tg随纤维素比例增加而降低,且明显低于两个独立组分的Tg,其规律为:Tg=A-B×Ln(WCell/WPEG)。与文献介绍的一些经典的高分子共混物Tg估算公式,如:Fox方程、Gordon-Taylor方程和Kwei方程相比较发现,其中惟有Fox方程似乎比较接近DSC实验导出的模型。更多还原

【Abstract】 Applying DSC method and several classic equations e.g.Fox,Gordon-Taylor and Kwei,to estimate the Tg for cellulose/poly(ethylene glycol) blend,results showed that this blend’s Tg is strongly influenced by the ratio of these two components,and this Tg was generally reduced with the increase of the cellulose percent in blend.According to DSC results,a model was deduced that might be available to describe above mentioned regulation between the ratio of two polymer components and blend’s Tg such as Tg=A-B×Ln(WCell /WPEG).Additionally,a comparison of mentioned classic equations with DSC results suggested that of these equations only the Fox Eq.seems to be acceptable due to presented similar tendency as DSC plot.更多还原