中国塑料 ›› 2023, Vol. 37 ›› Issue (10): 125-130.DOI: 10.19491/j.issn.1001-9278.2023.10.017

• 高分子功能改性与极端服役应用 • 上一篇    下一篇

氢氧化镁/氢氧化铝复配阻燃剂对可陶瓷化硅橡胶阻燃抗震性能的影响

王林锋1, 谢继凯1, 郭家杏1, 郝智1(), 郭建兵1,2, 龙晓琴1, 敖钱兰1, 朱妍1, 伍明蜜1   

  1. 1.贵州大学材料与冶金学院,贵阳 550000
    2.国家复合改性聚合物材料工程技术研究中心,贵阳 550000
  • 收稿日期:2023-06-08 出版日期:2023-10-26 发布日期:2023-10-23
  • 通讯作者: 郝智(1978-),女,副教授,博士,主要从事高分子材料合成及改性方面的研究工作,hz780104@sina.com
    E-mail:hz780104@sina.com
  • 基金资助:
    贵大SRT字(2022)005号;贵大人基合字(2020)53号

Effect of magnesium hydroxide/aluminum hydroxide compounding flame retardant on flame retardant and seismic performance of ceramicizable silicone rubber

WANG Linfeng1, XIE Jikai1, GUO Jiaxing1, HAO Zhi1(), GUO Jianbing1,2, LONG Xiaoqin1, AO Qianlan1, ZHU Yan1, WU Mingmi1   

  1. 1.School of Materials and Metallurgy,Guizhou University,Guiyang 550000,China
    2.The National Composite Modified Polymer Material Engineering Technology Research Center,Guiyang 550000,China
  • Received:2023-06-08 Online:2023-10-26 Published:2023-10-23
  • Contact: HAO Zhi E-mail:hz780104@sina.com

摘要:

以硅橡胶(SR)为基体,添加莫来石纤维(MF)、空心玻璃微珠(GB)、碳酸钙(CaCO3)、2,5⁃二甲基⁃2,5⁃双(叔丁基过氧基)己烷、铁红(Fe2O3),制备了母炼胶。通过添加不同份数比的氢氧化铝[Al(OH)3]和氢氧化镁[Mg(OH)2],经过密炼、开炼、硫化制备了可陶瓷化阻燃有机硅橡胶复合材料。结果表明,所制备的可陶瓷化阻燃硅橡胶复合材料中,GB在高温下能够起到黏结桥梁的作用,MF能很好地起到骨架作用,添加30份Mg(OH)2的硅橡胶复合材料,其拉伸强度可达4.93 MPa,同时具有1 450.73 %的断裂伸长率,而极限氧指数(LOI)值可以达到31.8 %,水平垂直燃烧达到V⁃0级,硅橡胶复合材料在50 Hz频率、5 g加速度、1 050 ℃的温度下燃烧15 min,试样不被烧穿。

关键词: 硅橡胶, 氢氧化铝, 氢氧化镁, 阻燃, 抗震

Abstract:

A type of master rubber was prepared using silicone rubber (SR) as a matrix and mullite fiber (MF), hollow glass microbeads (GB), 2,5⁃dimethyl⁃2,5⁃di(tert⁃butylperoxy)hexane, CaCO3, and Fe2O3 as additives. Then, ceramic⁃retardable flame⁃retardant silicone rubber composites were prepared by adding Al(OH)3 and Mg(OH)2 at different parts ratios through open mixing and vulcanization. The results indicated that GB played a role of bonding bridge at a high temperature and MF acted as a skeleton in the preparation of the ceramic⁃retardable flame⁃retardant silicone rubber composites. The rubber composite containing 30 parts of Mg(OH)2 obtained a tensile strength of up to 4.93 MPa, elongation at break of 1 450.73 %, and a limiting oxygen index of 31.8 vol%. The silicone rubber composite with a thickness of 6 mm could burn for 15min at a frequency of 50 Hz, 5 g acceleration, and a temperature of 1 050 °C without burning through.

Key words: silicone rubber, flame retardant, aluminum hydroxide, magnesium hydroxide

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