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  1. smith, j.a., et al. (2020). hydrophobic polyether polyols for high-performance coatings. progress in organic coatings, vol. 145, pp. 105712.
  2. chen, y., & zhang, l. (2019). recent advances in hydrophobic modification of polyurethane materials. polymer reviews, vol. 59, no. 3, pp. 411¨C438.
  3. kim, h.j., et al. (2021). water resistance and durability of polyether-based polyurethane sealants. journal of applied polymer science, vol. 138, issue 24.

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