| 초록 |
As a kind of phase change materials for thermal energy storage, poly(ethylene glycol) (PEG) has a melting temperature ranging from ca. 0℃ to 70℃ and relatively higher phase change enthalpy depending on its molecular weight. In addition, it is intrinsically biocompatible due to its molecular structure. Here we report a model system of polymers consisted of PEG block and monomeric functional group such as vinyl, carboxyl, and isocyanate groups. The phase transition behavior of PEG block copolymer was found to be resulted from the well-formed phase separation structure, in which PEG soft segments make a main role for the heat storage through the transition between crystalline and amorphous states. The detailed thermal properties are analysed with aids of DSC, SEM, and other apparatus. |
