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Biomass Chemical Engineering ›› 2021, Vol. 55 ›› Issue (2): 50-54.doi: 10.3969/j.issn.1673-5854.2021.02.008

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Preparation and Flame Retardant Properties of Dimethyl Methylphosphonate/Sodium Lignosulfonate Polyurethane Foam

Ze YU, Xu LI, Jianan WANG, Zhiming LIU()   

  1. College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
  • Received:2020-09-03 Online:2021-03-30 Published:2021-03-23
  • Contact: Zhiming LIU E-mail:zhimingliuwhy@126.com

Abstract:

Sodium lignosulfonate (SLS) was used to replace part of polyether polyol, and dimethyl methylphosphonate (DMMP) was used as additive flame retardant, then the sodium lignosulfonate polyurethane foam (SLS/PUF) was prepared by one-step foaming method.The flame retardant properties of the materials were analyzed by limiting oxygen index (LOI) test, and the influence of SLS substitution amount and DMMP addition amount on the material properties were explored. The burning behavior was studied by using the cone calorimeter (CONE). The test results showed that the flame-retardant SLS/PUF material had the best flame-retardant performance when the SLS substitution rate was 80%, and the LOI value reached 24.5%. On the basis of this replacement rate, when the addition amount of DMMP was 30%, the LOI value of the flame-retardant PUF material reaches 27.3%. Compared with pure PUF materials, the addition of SLS and DMMP reduced the heat release rate from 245.2 kW/m2 to 166.8 kW/m2, and the total heat release and total smoke release also reduced by 0.2 MJ/m2 and 0.4 m2 and reached 12.1 MJ/m2 and 3.4 m2. At the same time, the residual carbon content of the flame retardant added material was increased from 20.3% to 37.3%, which promoted the carbon formation of the material and made the SLS/PUF material have good flame retardant properties.

Key words: polyurethane foam, dimethyl methylphosphonate, sodium lignosulfonate, flame retardant, burning behavior

CLC Number: