高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (1): 146.

• 论文 • 上一篇    下一篇

用锥形量热仪研究聚乙烯膨胀阻燃体系的燃烧性

李斌, 孙才英, 张秀成   

  1. 东北林业大学化学系, 哈尔滨 150040
  • 收稿日期:1997-11-25 出版日期:1999-01-24 发布日期:1999-01-24
  • 通讯作者: 李　斌,男,35岁,博士,副教授.
  • 基金资助:

    黑龙江省自然科学基金

An Investigation of Flammability of Intumescent Flame Retardant Polyethylene Containing Starch by Using Cone Calorimeter

LI Bin, SUN Cai-Ying, ZHANG Xiu-Cheng   

  1. Department of Chemistry, Northeast Forestry University, Harbin, 150040
  • Received:1997-11-25 Online:1999-01-24 Published:1999-01-24

PDF (PC)

被引次数

62

摘要： 利用锥形量热仪在50kW·m-2热辐照条件下,研究了含淀粉膨胀阻燃线性低密度聚乙烯(LLDPE)体系的燃烧性,获得了最大热释放速率、总热释放、有效燃烧热、最大烟产生速率、总烟释放量及质量损失速度等参数.实验结果表明:含淀粉膨胀阻燃剂能明显降低LLDPE的热释放速率、总热释放和有效燃烧热,淀粉作为膨胀型阻燃剂中的成炭剂,可以部分代替季戊四醇,而对热释放速率影响不大,达到了阻燃和降低成本的目的.该膨胀体系使烟释放变得缓慢,但总烟释放量明显增大.在燃烧时使LLDPE更早地发生热降解,但热降解速度变得缓慢.

关键词: 淀粉, 含淀粉膨胀型阻燃剂, LLDPE, 燃烧性, 锥形量热仪

Abstract: The behaviour of flammability of linear low density polyet hylene(LLDPE)treated with The int umescent flame retardant containing starch has been investigated by using cone calorimeter at incidenTheat flux of 50kW·m-2in this paper.Based upon The parameters, such as peak heat release rate(p k-HRR), total heat release(THR), effective heatof combustion (EHC), peak smoke production rate(pk-SPR), total smoke production(TSP)and mass loss rate (MLR), etc.taken from The cone calorimeter, some results were obtained as follows:Firstly, starch-containing intumescent flame retardant(S-IFR) obviously lowered pk-HRR, THR and EHC, i.e., 485 kW·m-2, 905kJ, 33.2 MJ·kg-1respectively for LLDPE/S-IFR, 1951kW ·m-2, 1019 kJ, 44.7MJ·kg-1for LLDPE. pk-HRR increased slightly with increasing the percentage of starch in char forming agent s;secondly, S-IFRmade pk-SPR of LLDPE becomelower, however, it significantly enhanced TSP at The end of combustion;finally, S-IFR promot-ed The Thermal degradation of LLDPEearlier, and made The rate of Thermal degradation lower.

Key words: Starch, Starch-containing intumescent flame retardant(S-IFR), LLDPE, flammabil-ity, Cone calorimeter

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