主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2020, Vol. 39 ›› Issue (12): 1630-1634.

• • 上一篇    下一篇

白炭黑对硅橡胶性能的影响

祝海波1，商珂2，林贵德2，赵璧2，杨进军1，王俊胜2   

  1. 1. 天津理工大学环境科学与安全工程学院，天津300384；2. 应急管理部天津消防研究所，天津300381
  • 出版日期:2020-12-15 发布日期:2020-12-15
  • 通讯作者: 王俊胜（1982-），男，山东临沂人，应急管理部天津消防研究所副研究员，博士，主要从事防火阻燃材料和消防员个人防护装备研究。
  • 作者简介:祝海波（1995-），男，浙江杭州人，天津理工大学环境科学与安全工程学院硕士研究生，主要从事阻燃橡胶材料研究，天津市西青区宾水西道391 号，300384。
  • 基金资助:
    国家重点研发计划项目（2020YFB0311300，2020YFB0311302）；应急管理部天津消防研究所基科费项目（2018SJ03

Effect of white carbon black on main properties of silicone rubber

ZHU Hai-Bo1, SHANG Ke2, LIN Gui-De2, ZHAO Bi2, YANG Jin-Jun1, WANG Jun-Sheng2   

  1. 1. School of Environmental Science and Safety Engineering,Tianjin University of Technology, Tianjin 300384, China;2. Tianjin Fire Science and Technology Research Institute of MEM, Tianjin 300381, China
  • Online:2020-12-15 Published:2020-12-15

摘要： 采用电子万能试验机、极限氧指数、垂直燃烧仪、同步热分析仪和锥形量热仪等，系统研究了白炭黑添加量对硅橡胶/白炭黑复合材料的力学性能、阻燃性能、热稳定性和燃烧性能的影响。结果表明：白炭黑能显著提高复合材料的力学性能，白炭黑添加40 份时，复合材料力学性能达到最佳，其拉伸强度为9.35MPa，断裂伸长率为614.7%；白炭黑能改善复合材料的阻燃性能，白炭黑量达到50 份时，复合材料极限氧指数可达25.0%；白炭黑添加能明显提高复合材料的初始热分解温度和高温成炭率，白炭黑添加量为40 份时初始热分解温度为495.4 ℃，高温残炭率为31.4%；白炭黑的添加能有效降低复合材料的热释放速率、总热释放量、总生烟量和二氧化碳生成量，对硅橡胶有较好的阻燃抑烟作用。

关键词: 硅橡胶, 力学性能, 阻燃性能, 热稳定性, 燃烧行为

Abstract:

The effects of silica on mechanical properties, flame retardancy, thermal stability and combustion properties of silicone rubber/silica composites were studied by means of electronic universal testing machine, limiting oxygen index, vertical combustion instrument, synchronous thermal analyzer and cone calorimeter. The results show that the mechanical properties of the composite could be improved significantly with the addition of silica, and the mechanical properties of the composites reach the best while the loading of silica is 40 phrs, the tensile strength is 9.35 MPa, the elongation at break is 614.7%. The flame retardancy of the composites increase with the increase of the addition of silica, and the value of limiting oxygen index of the composite can reach 25.0% while the loading of silica is 50 phrs. The thermal stability of silicone rubber/silica composites are improved significantly with the addition of silica, the initial thermal decomposition temperature and the residual at high temperature of silicone rubber/silica composite with 40 phrs silica are 495.4 ℃ and 31.4%, respectively. The heat release rate, total heat release, total smoke production and carbon dioxide generation of silicone rubber/silica composites are reduced effectively by adding silica, which suggests silica has good flame retardancy and smoke suppression effect on silicone rubber.

Key words: silicone rubber, mechanical properties, flame retardancy, thermal stability, combustion behavior