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  1. h. ulrich, chemistry and technology of isocyanates, wiley, 2018
  2. m. szycher, szycher’s handbook of polyurethanes, crc press, 2nd edition
  3. j. k. gillham, ¡°polyurethane foams for thermal insulation uses: a review¡±, journal of cellular plastics, vol. 55, issue 2, 2019
  4. iso 8136:2019 – plastics – rigid cellular polyurethane materials – specification
  5. astm d2859-17 – standard test method for ignition characteristics of finished items using a radiant heat energy source

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