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  1. zhang, l., wang, y., & liu, h. (2020). development of tin-free catalysts for polyurethane foaming: a review. journal of applied polymer science, 137(24), 48698.
  2. smith, j. r., & johnson, m. l. (2019). environmental and performance evaluation of non-tin catalysts in polyurethane systems. polymer degradation and stability, 167, 108¨C117.
  3. ¹ú¼ÒÉú̬»·¾³²¿. (2022). ¡¶ÐÂÎÛȾÎïÖÎÀíÐж¯·½°¸¡·.
  4. european chemicals agency (echa). (2021). restriction of organotin compounds in consumer products.
  5. kim, s. h., & park, j. k. (2018). stability and aging resistance of polyurethane foams using bismuth-based catalysts. journal of cellular plastics, 54(5), 453¨C467.
  6. À¹ú, Íõΰ. (2021). »·±£Ð;۰±õ¥´ß»¯¼ÁÑо¿½øÕ¹. ÖйúËÜÁÏ£¬35(12)£¬45-51.
  7. astm d6551/d6551m-17. standard test methods for accelerated weathering of cellulosic building products.
  8. iso 4892-3:2013. plastics ¡ª methods of exposure to laboratory light sources ¡ª part 3: fluorescent uv lamps.

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