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[1] zhang, y., et al. (2022). "delayed action tertiary amine catalysts for polyurethane foam: a review." journal of applied polymer science, 139(4), 51867.
[2] smith, j., & lee, h. (2021). "green catalysts in polyurethane chemistry." green chemistry letters and reviews, 14(3), 231¨C244.
[3] liu, m., et al. (2023). "development of ph-responsive delayed catalysts for eco-friendly polyurethane systems." polymer international, 72(6), 789¨C797.
[4] wang, x., & chen, z. (2020). "progress in microencapsulated catalysts for controlled reactivity in polymer synthesis." advanced materials interfaces, 7(15), 2000389.
[5] european chemicals agency (echa). (2021). reach regulation on the use of organotin compounds.
[6] u.s. environmental protection agency (epa). (2020). action plan for organotin compounds.
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