Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/77533
Title: A combination of POSS and polyphosphazene for reducing fire hazards of epoxy resin
Authors: Shi, Y
Yu, B 
Zheng, Y
Guo, J
Chen, B
Pan, Z
Hu, Y
Keywords: Epoxy resin
Flame-retardant mechanism
Polyhedral oligomeric silsesquioxane
Polyphosphazene
Thermal properties
Issue Date: 2018
Publisher: Wiley
Source: Polymers for advanced technologies, 2018, v. 29, no. 4, p. 1242-1254 How to cite?
Journal: Polymers for advanced technologies 
Abstract: Extensive application of epoxy resins (EPs) is highly limited by their intrinsic flammability. Combining EPs with nanoparticles and phosphorus-nitrogen flame retardants is an effective approach to overcome the drawback. In this work, simultaneous incorporation of octa-aminophenyl polyhedral oligomeric silsesquioxanes (OapPOSS) and polyphosphazene into EP was reported for the first time. Significantly, reduced peak of heat release rate and UL-94 V-0 rating were achieved by tuning suitable ratios of polyphosphazene and OapPOSS for EP composites. During combustion, polyphosphazene promoted char formation and released nonflammable gases such as CO2, NH3, and N2 to dilute oxygen concentration and cool pyrolysis zone. Moreover, numerous phosphorus-containing species acting as free radical scavengers were generated during degradation. Silicon dioxide evolving from OapPOSS protected char residues from thermal degradation. This study provides a novel method to fabricate high-performance flame-retardant EP composites, which have potential applications in the field of electrics and electronics.
URI: http://hdl.handle.net/10397/77533
ISSN: 1042-7147
EISSN: 1099-1581
DOI: 10.1002/pat.4235
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