Journal of Applied Polymer Science · 1998 · 33 citations · 0 references
EngineeringPhenol–formaldehyde Novolac ResinsOrganic ChemistryTriphenyl PhosphateChemistryPolymersChemical EngineeringPolymer MaterialFire RetardancyPolymer ProcessingStyrene-acrylonitrile CopolymersPolymer ChemistryFire ChemistryMaterials SciencePolymer EngineeringPolymer AnalysisPolymer ScienceStyrene–acrylonitrile ResinsPolymer CharacterizationPhenol–formaldehyde-type ResinsPolymer AdditivePhenol-formaldehyde-type Resins
The thermal and flame-retardant properties of phenol–formaldehyde-type resins (crosslinked and noncrosslinked) in mixtures with triphenyl phosphate and styrene–acrylonitrile resins were evaluated. The mixtures show a synergistic effect between triphenyl phosphate and novolacs. Those containing phenol–formaldehyde novolac resins are found to be most flame retardant. There does not seem to be a relationship between the oxygen index (OI) and UL 94 tests. Scanning electron microscopy analysis show a surface structure with cavities and stratification, very similar to that of intumescent additives. Evidence was found indicating that this flame-retardant system works in both the gas and condensed phase. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 68: 1067–1076, 1998