Impact of halogen-free flame retardant with varied phosphorus chemical surrounding on the properties of diglycidyl ether of bisphenol-A type epoxy resin: synthesis, fire behaviour, flame-retardant mechanism and mechanical properties - Zhao, Xiaomin; Babu, Heeralal Vignesh; Llorca, Javier; Wang, De-Yi; (Rsc Advances, 2016)