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Solvent-free synthesis of PEG modified polyurethane solid-solid phase change materials with different Mw for thermal energy storage

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Abstract

The different molecular weights of polyurethane (PU), using as solid-solid phase change materials, were synthesized by different molar ratios of polyethylene glycol (PEG, Mn = 8000), 4,4’-methylenebis (cyclohexyl isocyanate) (H12MDI), and Emulsogen TS200 (tristyrylphenol polyglycol ether), through solvent-free bulk polymerization method. Differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), and polarization optical microscopy (POM) were applied to examine the characteristics of phase transition and crystalline morphology. According to the results of examination, both latent heat and crystalline structure were affected by the molecular weight. The enthalpies of fusion and crystallization reached up to 129.59 and 105.45 J/g, respectively, suggesting a promising future for this phase change material to be applied in thermal energy storage.

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Funding

It is acknowledged that this work was supported by the National key research and development program (No.2018YFC1801503), the Shanghai Colleges and Universities Experimental Technology Construction Plan (No.A4-0100-19-SDJH0403), the Shanghai Sailing Program (No.19YF1417800), and the Start-Up Funds of Shanghai University of Engineering Science (No.E3-0507-19-05111).

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  1. College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China

    Xin Fan, Zhian Pu, Min Zhu, Zhenlin Jiang & Jingli Xu

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  1. Xin Fan
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Fan, X., Pu, Z., Zhu, M. et al. Solvent-free synthesis of PEG modified polyurethane solid-solid phase change materials with different Mw for thermal energy storage. Colloid Polym Sci 299, 835–843 (2021). https://doi.org/10.1007/s00396-020-04804-3

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  • DOI: https://doi.org/10.1007/s00396-020-04804-3

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