Abstract:The thermal-regulated fabrics dependent on the phase change were prepared by in-situ polymerization under UV irradiation with tetradecanol as core material and polymethylmethacrylate- polybutyl acrylate as shell materials. Filed emission scanning electron microscopy(FE-SEM), differential scanning calorimetry(DSC), thermal gravimetric analysis(TGA)and precision temperature recorder were applied to characterize the surface morphology, thermal properties, temperature-regulation property. The results indicate that under the emulsification speed of 2500 r/min, tetradecanol is coated by copolymer in film form, and distributed uniformly among fibers. The test results show that the fabrics thermal-regulation range of temperature is 22~34 ℃ or 36~42 ℃ and the latent heat of 17.24 J/g. The phase change materials on the polyester fabrics don’t leak after heating for 30 min at 70 ℃. The decomposition temperature is 20 ℃ higher than that of tetradecanol. The related fabrics have good heat stability. The cooling curves indicate that polyester fabric performs good temperature-regulation.