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

• Functional modification of polymers and their extreme service applications • Previous Articles     Next Articles

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

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

CLC Number: