High performance flame-retardant organic–inorganic hybrid epoxy composites with POSS and DOPO-based co-curing agent. Issue 14 (18th March 2022)

• Record Type: Journal Article
• Authors: Xu, Wei-Hua; Yan, Shi-Jing; Zhao, Jian-Qing
• Is Part Of: RSC advances. Volume 12:Issue 14(2022)
• Page Start: 8559
• Page End: 8568
• Publication Date: 2022-03-18
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra09401g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : This paper introduces flame-retardant organic–inorganic hybrid epoxy composites possessing excellent comprehensive performance, which results from the phosphorus–silicon synergistic flame retardant effect of the glycidyl POSS and DOPO derivative. Abstract : Polyhedral oligomeric silsesquioxane (POSS) and a highly effective 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO)-based flame retardant co-curing agent (D-bp) were chemically introduced into the 4, 4′-diaminodiphenyl methane (DDM)/diglycidyl ether of bisphenol A (DGEBA) epoxy system to create organic–inorganic hybrid epoxy composites with simultaneously improved flame retardancy and mechanical properties. The results revealed that POSS/D-bp/DGEBA hybrid composites exhibited excellent comprehensive performance, in which the V-0 criterion of the UL-94 test was passed and the peak of heat release rate (P-HRR) was significantly decreased from 939 to 371 kW m −2 when the phosphorus content was only 0.25 wt%. The glass transition temperature ( T g ) increased by 16.2 °C and obvious improvement in the mechanical properties was also evidenced.