Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (3): 10-13,18.

• Materials Science & Technology • Previous Articles     Next Articles

Research on Flame Retardancy of Intumescent Halogen-Free Flame-Retardant Polypropylene Using Cone Calorimeter

Liu Fang  Sun Ling  Luo Yuan-fang  Jia De-min   

  1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2008-08-17 Revised:2008-10-07 Online:2009-03-25 Published:2009-03-25
  • Contact: 刘芳（1964-），男，博士，教授，主要从事高分子材料的合成与改性研究． E-mail:mcfliu@scut．edu．cn
  • About author:刘芳（1964-），男，博士，教授，主要从事高分子材料的合成与改性研究．
  • Supported by:

    广东省自然科学基金团队项目（039172）;广东省科技攻关项目（2004816001194）

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Abstract:

Intumescent halogen-free flame-retardant polypropylene was prepared respectively according to the in-situ reaction compatibility method and the direct adding method, and the flame retardancy of the product was then evaluated using a cone calorimeter. The results show that the intumescent halogen-free flame-retardant polypropylene is of excellent flame retardancy greatly affected by the preparation methods, and that, as compared with the direct adding method, the in-situ reaction compatibility method may result in more excellent flame retardancy of the flame- retardant polypropylene, namely the ignition time lasts from 23 s to 27 s, the maximum heat-releasing rate decreases from 298 kW/m2 to 249 kW/m2, the average heat-releasing rate decreases from 125.4 kW/m2 to 86. 5 kW/m2, the total heat release decreases from 148.6 MJ/m2 to 124. 5 MJ/m2, the total smoke release decreases from 372 m2/m2 to 266m2/m2 and the combustion residue increases from 27.5% to 33.9%.

Key words: polypropylene, in-situ reaction, intumescent flame retardant, cone calorimeter