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  1. polyurethanes, product data sheet ¨C suprasec 2082, 2023
  2. zhang, y., et al. (2021). "low voc emission of polyurethane foams based on modified mdi." journal of applied polymer science, 138(24), 50345.
  3. wang, l., & liu, h. (2020). "environmental and health impact assessment of polyurethane raw materials." chinese journal of environmental engineering, 14(3), 45¨C52.
  4. european chemicals agency (echa), substance information ¨C diphenylmethane diisocyanate (mdi), 2022
  5. us epa. (2019). "volatile organic compounds’ impact on indoor air quality." united states environmental protection agency report.

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