A novel flame retardant containing phosphorus, nitrogen, and sulfur

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• 作者：Yezhong Chen (1)
  Huaqiao Peng (2) (3)
  Jiehua Li (1)
  Zuxi Xia (2) (3)
  Hong Tan (1)
  
• 关键词：Intumescent flame retardant ; Phosphorus–nitrogen ; Sulfur ; Thermoplastic polyurethanes
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2014
• 出版时间：February 2014
• 年：2014
• 卷：115
• 期：2
• 页码：1639-1649
• 全文大小：1,417 KB
• 作者单位：Yezhong Chen (1)
  Huaqiao Peng (2) (3)
  Jiehua Li (1)
  Zuxi Xia (2) (3)
  Hong Tan (1)
  
  1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
  2. Aviation Fuel & Chemical Airworthiness Certification Center of CAAC, No. 765 Tengfei Road, Southwest Airport Economic Development Zone, Chengdu, 610200, China
  3. The Second Research Institute of CAAC, No. 17 South Section?2, Erhuan Road, Chengdu, 610041, China
  
• ISSN：1572-8943

文摘

In this article, a novel intumescent flame retardant (IFR) PNSFR containing three flame-retardant elements, phosphorus, nitrogen, and sulfur was designed and synthesized. Then a series of flame-retardant thermoplastic polyurethanes (TPU) were prepared using the PNSFR. The effects of the flame retardant on the flammability of TPU/PNSFR composites were investigated by limited oxygen index (LOI) and UL-94 vertical burning. The results showed that TPU containing 10?mass% PNSFR had the highest LOI value (36) and could reach the V-0 rating. The flame-retardant mechanism of PNSFR in TPU was also disclosed using thermogravimetric analysis (TG), scanning electron micrograph, TG-infared spectrometry, and Fourier transform infrared spectroscopy. The sulfur and phosphorus elements of PNSFR can be kept in residual char. Moreover, an optimal loading amount of the IFR in TPU is in favor of forming dense and continuous char layer to prevent heat transfer and the spread of flammable gases. The IFR PNSFR may find potential use for various flame-retardant polyurethanes.