Surface modification of magnesium hydroxide and its application in flame-retardant oil-extended styrene-ethylene-butadiene-styrene/polypropylene composites
Surface modification of magnesium hydroxide and its application in flame-retardant oil-extended styrene-ethylene-butadiene-styrene/polypropylene composites
复制标题
氢氧化镁的表面改性及其在阻燃充油苯乙烯-乙烯-丁二烯-苯乙烯/聚丙烯复合材料中的应用
DOI：
10.1002/app.47129
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发表时间：
2019-03-05
影响因子：
3
通讯作者：
Li, Bin
中科院分区：
文献类型：
--
作者：
Liu, Lubin;Xu, Miaojun;Li, Bin
用三乙氧基硅烷和聚甲基乙烯基硅橡胶对氢氧化镁(MH)进行改性，制备了阻燃充油苯乙烯-乙烯-丁二烯-苯乙烯(O-SEBS)-聚丙烯(PP)复合材料。改性后的氢氧化镁(MMH)与水的接触角达到141度，说明MMH具有良好的疏水性能。当MH或MMH的负载量为70wt%时，样品(1.6 mm)在垂直燃烧试验中通过了UL-94V-0评级。这说明改性不会降低MH的阻燃性能。与MH-O-SEBS-PP相比，MMH-O-SEBS-PP复合材料的拉伸强度和断裂伸长率分别提高了20.4%和88.9%。MH的改性增强了阻燃剂与基体之间的界面相容性，从而提高了材料的力学性能。在70℃下水处理168h后，MMH几乎没有被提取出来，因此，水处理后的MMH-O-SEBS-PP复合材料的力学性能和阻燃性能都得到了很好的保持。MH的改性使O-SEBS-PP复合材料具有良好的相容性和耐水性。(C)2018年威利期刊公司J.Appl。波兰姆。SCI。2019年，136%，47129。
Magnesium hydroxide (MH) was modified with triethoxysilane and polymethyl-vinyl silicone rubber and used to prepare flame-retardant oil-extended styrene-ethylene-butadiene-styrene (O-SEBS)-polypropylene (PP) composites. The water contact angle of modified magnesium hydroxide (MMH) reached 141 degrees; this indicated that MMH possessed excellent hydrophobic properties. The samples (1.6mm) passed the UL-94V-0 rating during vertical burning tests when the loading amount of MH or MMH was 70 wt %. This indicated the modification did not decrease the flame-retardant properties of MH. The tensile strength and elongation at break values of the MMH-O-SEBS-PP composites increased by 20.4 and 88.9%, respectively, compared with those of the MH-O-SEBS-PP composites. The modification of MH enhanced the interfacial compatibility between the flame retardant and the matrix; thus, the mechanical performance was enhanced. Moreover, MMH was scarcely extracted after water treatment for 168h at 70 degrees C. As a result, the mechanical properties and flame retardancy of the MMH-O-SEBS-PP composites were well maintained after the water treatment. The modification of the MH endowed the O-SEBS-PP composites with an excellent compatibility and water-resistant performance. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47129.