Nano-Sb<sub>2</sub>O<sub>3</sub>/BEO/PP复合材料阻燃性能

doi:10.11868/j.issn.1001-4381.2017.001155

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摘要

球磨混入溴化环氧树脂（BEO）和改性nano-Sb₂O₃以提高聚丙烯（PP）的阻燃性能，采用垂直燃烧（UL94）和极限氧指数（LOI）研究nano-Sb₂O₃/BEO/PP复合材料的阻燃性能，用扫描电镜（SEM）分析燃烧产物微观形貌，借助傅里叶变换红外光谱（FT-IR）和热重分析（TGA）研究Sb-Br阻燃体系协同作用机理。结果表明：改性nano-Sb₂O₃与BEO的反应可延长Br·在燃烧区的时间，从而消耗更多OH·和H·达到阻燃的目的。当改性nano-Sb₂O₃含量为7%（质量分数，下同），BEO含量为21%时，nano-Sb₂O₃/BEO/PP复合材料具有优异的阻燃性能，其极限氧指数值为28.6%，垂直燃烧等级UL94为V-0级。

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	徐建林
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	赵金强

关键词 ：聚丙烯, nano-Sb₂O₃, 溴化环氧树脂, 阻燃性能

Abstract：

To improve flame retardant properties of polypropylene, the brominated epoxy resin (BEO) and nano-Sb₂O₃ were added into polypropylene by using a high energy ball milling technique. Flame retardant properties of polypropylene composites were evaluated by UL94 vertical combustion tests and limit oxygen index (LOI). The surface morphology of combustion products of composites was characterized by scanning electron microscopy(SEM) and the flame-retardant mechanism of flame retardant additives acting on the polymer matrix was studied by using thermo gravimetric analysis(TGA) and Fourier transform infrared (FT-IR) spectroscopy. The results show that the reaction between modified nano-Sb₂O₃ and BEO can prolong residence of the halogens in the combustion area, resulting in more hydroxyl and hydrogen radicals are replaced by the bromine radicals. When the content of modified nano-Sb₂O₃ is 7% (mass fraction, the same below) and that of BEO is 21%, the nano-Sb₂O₃/BEO/PP composite has excellent flame retardant performance with 28.6% of LOI value and V-0 of UL94 grade of vertical combustion.

Key words： polypropylene nano-Sb₂O₃ brominated epoxy resin flame retardant performance

收稿日期: 2017-09-14 出版日期: 2019-01-16

中图分类号:

TB332

基金资助:国家自然科学基金资助项目(51761025);甘肃省科技计划资助项目(17CX2JD075)

通讯作者: 徐建林 E-mail: ggdjlxu@sina.com

作者简介: 徐建林(1970-), 男, 教授/博导, 工学博士, 从事材料制备、微结构与性能等方面的研究, 联系地址:甘肃省兰州市七里河区兰工坪路287号兰州理工大学材料科学与工程学院(730050), E-mail:ggdjlxu@sina.com

引用本文:

徐建林, 刘晓琦, 杨文龙, 牛磊, 赵金强. Nano-Sb₂O₃/BEO/PP复合材料阻燃性能[J]. 材料工程, 2019, 47(1): 84-90.
Jian-lin XU, Xiao-qi LIU, Wen-long YANG, Lei NIU, Jin-qiang ZHAO. Flame retardant performance of nano-Sb₂O₃/BEO/PP composites. Journal of Materials Engineering, 2019, 47(1): 84-90.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.001155 或 http://jme.biam.ac.cn/CN/Y2019/V47/I1/84

Table 1 实验复合材料成分配比

Table 2 实验复合材料LOI值、UL94等级及抗拉强度

Fig.1 复合材料垂直燃烧后的SEM图
(a)6^#；(b)7^#；(c)8^#；(d)9^#

Fig.2 复合材料炭层EDS图谱
(a)7^#；(b)9^#

Fig.3 实验复合材料在管式炉中加热到400℃的产物照片
(a)1^#; (b)7^#; (c)9^#

Fig.4 实验复合材料在管式炉中加热到400℃的产物的FT-IR图谱

Fig.5 PP及实验复合材料的TG (a)和DTG(b)曲线

Table 3 实验复合材料的TG分析数据

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