化学法制备的PEG/PET固固相转变材料

Synthesis of Solid - solid Phase Change Materials of PEG/PET by Chemical Bonding Method

研究了化学键连法和溶液共混法制备的聚乙二醇/涤纶(PEG/PET)固固相转变材料的相变焓、相变温度等物性,探索了两种材料的链结构与蓄热性能的关系。结果表明,在PEG相对分子质量一定时,对相同PEG含量的共混材料和化学改性材料而言,化学改性材料的相变焓小于共混材料的相变焓,但热稳定性有很大改善。

The enthalpy and transition temperature of solid - solid phase change materials of PEG/PET prepared by both chemical bonding method and blending method were studied in the paper. The relations between the heat storage properties and the structures of PEG chain in materials were explored. The results showed that the enthalpy of the chemical bonding materials was less than that of the blending materials, but the property of thermal stability had been improved greatly with both the same ratio and molecular weight of PEG in the materials.