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Synthesis and properties of castor oil based polyurethanes reinforced with double-decker silsesquioxane


Hybrid polyurethanes with double-decker silsesquioxane (DDSQ) in the main chains were synthesized using castor oil and isophorone diisocyanate (IPDI) as feedstock. Double-decker octaphenylsilsesquioxanetetraol (DDSQ) was prepared and characterized by 1H NMR and MALDI-TOF–MS. Meanwhile, FTIR, TGA, DSC, SEM, UV–Vis spectrophotometer, tensile test techniques and static contact angle were also carried out to investigate the structures and properties of the hybrid polyurethanes. The DDSQ-containing hybrid polyurethanes exhibited improved thermal stability in terms of thermogravimetric analysis (TGA). DSC analysis demonstrated that the hybrid polyurethanes with DDSQ displayed enhanced glass transition temperature. According to the results of SEM and UV–Vis spectrophotometer, the aggregates of DDSQ were dispersed homogeneously in the hybrid polyurethanes matrix. With the inclusion of DDSQ, the hydrophobicity of the hybrid material was significantly improved as the results of the static contact angles revealed.

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This work was supported by research Grants from the Fundamental Research Funds for the Central Universities (JUSRP51623A) and the Cooperative Innovation Foundation of Industry, Academy and Research Institutes (BY2013015-10) in Jiangsu Province of China.

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Correspondence to Pingping Jiang.

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Huang, J., Jiang, P., Wen, Y. et al. Synthesis and properties of castor oil based polyurethanes reinforced with double-decker silsesquioxane. Polym. Bull. 74, 2767–2785 (2017).

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  • Castor oil
  • Polyol
  • Hybrid polyurethane
  • Double-decker silsesquioxane