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氢氧化镁/可膨胀石墨/聚丙烯复合材料的热降解过程与燃烧行为

张立飞 柳军旺 马成国 王永亮 韩志东

张立飞, 柳军旺, 马成国, 王永亮, 韩志东. 氢氧化镁/可膨胀石墨/聚丙烯复合材料的热降解过程与燃烧行为[J]. 华南师范大学学报(自然科学版), 2020, 52(1): 17-22. doi: 10.6054/j.jscnun.2019120
引用本文: 张立飞, 柳军旺, 马成国, 王永亮, 韩志东. 氢氧化镁/可膨胀石墨/聚丙烯复合材料的热降解过程与燃烧行为[J]. 华南师范大学学报(自然科学版), 2020, 52(1): 17-22. doi: 10.6054/j.jscnun.2019120
ZHANG Lifei, LIU Junwang, MA Chengguo, WANG Yongliang, HAN Zhidong. Thermal Degradation and Combustion Behavior of Flame Retardant Polypropylene with Expandable Graphite and Magnesium Hydroxide[J]. Journal of South China normal University (Natural Science Edition), 2020, 52(1): 17-22. doi: 10.6054/j.jscnun.2019120
Citation: ZHANG Lifei, LIU Junwang, MA Chengguo, WANG Yongliang, HAN Zhidong. Thermal Degradation and Combustion Behavior of Flame Retardant Polypropylene with Expandable Graphite and Magnesium Hydroxide[J]. Journal of South China normal University (Natural Science Edition), 2020, 52(1): 17-22. doi: 10.6054/j.jscnun.2019120

氢氧化镁/可膨胀石墨/聚丙烯复合材料的热降解过程与燃烧行为

doi: 10.6054/j.jscnun.2019120
基金项目: 

国家自然科学基金项目 50802022

黑龙江省自然基金项目 E2018040

详细信息
    通讯作者:

    韩志东,教授,Email:zhidong.han@hrbust.edu.cn

  • 中图分类号: TB332

Thermal Degradation and Combustion Behavior of Flame Retardant Polypropylene with Expandable Graphite and Magnesium Hydroxide

  • 摘要: 以可膨胀石墨(EG)和氢氧化镁(MH)为无卤阻燃剂,通过熔融共混法制备了无卤阻燃聚丙烯(PP)复合材料(EG/PP、MH/PP和MH/EG/PP),采用热重法研究了复合材料的热降解过程,以氧指数(LOI)和垂直燃烧(UL-94)评价研究了复合材料的阻燃性能,采用锥形量热仪研究了复合材料的燃烧行为.结果表明:MH和EG间存在显著的协同阻燃作用,在阻燃剂质量分数为60%时,MH与EG质量比为5 : 1的MH/EG/PP材料其氧指数可以达到29.7,与MH/PP复合材料相比提高了11.2%;EG与MH协同具有良好的降低热释放作用,与PP和MH/PP相比,MH/EG/PP复合材料的热释放速率峰值(peak-HRR)分别降低了73.9%和34.2%;EG和MH的协同作用大幅度降低了MH/EG/PP的质量损失速率;结合残炭的形貌结果,揭示了EG和MH协同阻燃机理的关键在于增强了炭层的隔热和隔氧作用.
  • 图  1  复合材料的HRR、THR曲线

    Figure  1.  The HRR and THR curves of the composites

    图  2  复合材料燃烧测试后的残炭数码照片

    Figure  2.  The digital photos of char residues after combustion test of the composites

    图  3  PP与EG/PP复合材料的TG和DTG曲线

    Figure  3.  The TG and DTG curves of PP and EG/PP composite

    图  4  MH/PP与MH/EG/PP复合材料的TG及DTG曲线

    Figure  4.  The TG and DTG curves of MH/PP and MH/EG/PP composites

    图  5  复合材料的拉伸强度

    Figure  5.  The tensile strength of the composites

    表  1  复合材料配方

    Table  1.   The formulations of the composites

    样品 质量分数/%
    PP MH EG
    PP 100 0 0
    EG/PP 90 0 10
    MH/PP 40 60 0
    EG/MH/PP 40 50 10
    注:PP、MH、EG分别表示聚丙烯、Mg(OH)2和可膨胀石墨,下表同.
    下载: 导出CSV

    表  2  EG和MH的粒度

    Table  2.   The particle size of EG and MH μm

    样品 D50 D90
    EG 76.45 109.58
    MH 9.25 11.32
    下载: 导出CSV

    表  3  复合材料的阻燃性能

    Table  3.   The flame retardant properties of the composites

    样品 LOI/% UL-94
    PP 17.5 N.R.
    EG/PP 22.3 N.R.
    MH/PP 26.7 V-0
    MH/EG/PP 29.7 N.R.
    下载: 导出CSV

    表  4  复合材料的TG数据

    Table  4.   The TG data of the composites

    样品 T5/℃ T50/℃ Tm/℃ Rm/ (%·min-1) W800/%
    PP 294 339 340 14.6 0.6
    EG/PP 359 431 437 12.9 9.8
    MH/PP 353 414 407 20.1 41.5
    MH/EG/PP 317 418 403 8.9 40.2
    下载: 导出CSV
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  • 收稿日期:  2019-10-31
  • 刊出日期:  2020-02-25

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