High performance flame-retardant organic-inorganic hybrid epoxy composites with POSS and DOPO-based co-curing agent

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 cre...

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Bibliographic Details
Published in:RSC advances 2022-03, Vol.12 (14), p.8559-8568
Main Authors: Xu, Wei-Hua, Yan, Shi-Jing, Zhao, Jian-Qing
Format: Article
Language:English
Subjects:
Bisphenol A
Chemistry
Curing agents
Flame retardants
Glass transition temperature
Heat release rate
Hybrid composites
Mechanical properties
Polyhedral oligomeric silsesquioxane
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Summary: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. 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.
ISSN:2046-2069
2046-2069
DOI:10.1039/d1ra09401g