China Plastics ›› 2022, Vol. 36 ›› Issue (4): 115-120.DOI: 10.19491/j.issn.1001-9278.2022.04.017

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Effects of different POSS on properties of phosphorus⁃silicon synergistic flame retardant epoxy resin

XU Weihua1,2, ZHENG Yu1,2, SHEN Xiangyang1,2, ZHANG Yan1,2, LIU Juwen1,2, YAN Shijing1,2()   

  1. 1.School of Materials and Environment,Guangxi University for Nationalities,Nanning 530008,China
    2.Guangxi Key Laboratory of Chemistry and Engineering of Forest Products,Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products,Nanning 530008,China
  • Received:2021-12-15 Online:2022-04-26 Published:2022-04-24

Abstract:

The phosphorus?silicon synergistic flame?retardant epoxy resins were prepared separately by using two types of polyhedral oligomeric silsesquioxane (POSS) combined with 9,10?dihydro?9?oxa?10?phosphaphenanthrene?10?oxide (DOPO)?based organophosphorus flame retardants (D?bp), and their flame retardant, thermal properties, mechanical, and dynamic mechanical properties were investigated. The results indicated that the phosphorus?silicon synergistic flame retardant epoxy resins obtained a UL 94 V?0 rating at a phosphorus content of only 0.25 wt%. The epoxy resins exhibited a peak heat release rate of 313.9 kW/m2, total heat release of 118.2 MJ/m2, and average effective combustion heat of 23.1 MJ/kg, which decreased by 66.6 %, 41.4 % and 26.9 % respectively when the Phenyl?POSS was compounded with D?bp. The combination of Epoxy?POSS and D?bp could simultaneously improve the flame retardant, thermal, mechanical, and dynamic mechanical properties of phosphorus?silicon synergistic flame retardant epoxy resins, indicating excellent comprehensive performance.

Key words: polyhedral oligomeric silsesquioxane, 9,10?dihydro?9?oxa?10?phosphaphenanthrene ?10?oxide, epoxy resin, halogen?free flame retardant, synergistic flame retardant

CLC Number: