关键词：新能源与高效节能；储能技术；超支化聚氨酯；固-固相变材料；聚乙二醇
摘 要：A novel hyperbranched polyurethane solid-solid phase change heat storage material (HB-PUPCM) using hyperbranched polyester as chain extender was synthesized via a two-step proccss.Differential scanning calorimetry (DSC) and polarizing optical microscopy (POM) were (formed) to investigate the phase transition behaviors and crystalline morphology.The results (ted) that the HB-PUPCM was a good polymeric solid-solid phase change heat storage material.