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A linear polyurea (LPU) and a crosslinked polyurea (CPU) were respectively synthesized by condensation between 4,4′‐diaminodiphenyl methane and multivariate isocyanates, and then were used as supporting material to load polyethylene glycol (PEG) for shape‐stabilized phase change materials (ssPCMs). LPU has an incompact flocculent morphology with higher surface area and pore volume than CPU, and CPU...