| abstract |
The invention provides a comb-shaped polyurethane phase-change energy storage material and a preparation method thereof, one of its general structural formulas is as follows: In the above general formula, only one end of the polyethylene glycol segment is linked to the polyurethane main chain, and the other end is in an unrestricted state, which greatly improves the movement of the polyethylene glycol segment while maintaining the solid-solid phase transition of the material. degree of freedom and crystallization properties, and thus improve the phase change enthalpy of the phase change material. The preparation method of the invention has the advantages of simple and easy-to-control reaction process, complete reaction and no monomer residue. |