Modified diphenyl oxide resin was synthesized by co-polymerization of unsaturated acid and diphenyl oxide derivants. And then modified bismaleimide resin and expoxide linear phenolic resin were added into modified dip...Modified diphenyl oxide resin was synthesized by co-polymerization of unsaturated acid and diphenyl oxide derivants. And then modified bismaleimide resin and expoxide linear phenolic resin were added into modified diphenyl oxide resin to co-polymerize and modify once more. The system was applied in composites. Their properties were investigated and found that they met the requirements as a heat-resisting adhesive.展开更多
A fluorescent ternary europium complex containing bis (diphenyl phosphine oxide) methane which functioned as both a neutral and anion ligand, and thenoyltrifluoroacetonato anion was synthesized and characterized by e...A fluorescent ternary europium complex containing bis (diphenyl phosphine oxide) methane which functioned as both a neutral and anion ligand, and thenoyltrifluoroacetonato anion was synthesized and characterized by elemental analysis, DTA TG analysis, UV Vis, FT IR and MS spectroscopy. The chemical formula is proved to be Eu(TTA)(MPPO)(HMPPO)·(NO 3)·2H 2O. Its luminescence quantum efficiency(in acetonitrile, 26 3%) is approximately the same as that of the commonly used red emission luminescent compound, Eu(TTA) 3(TPPO) 2 (TPPO is triphenyl phosphine oxide). The new complex has comparatively long fluorescence lifetime.展开更多
To obtain high-performance flame-retardant epoxy resin(EP),diglycidyl ether of(2,5-dihydroxyphenyl)diphenyl phosphine oxide(DPO-HQ-EP)was synthesized.EP/DPO-HQ-EP samples with varying phosphorus contents were prepared...To obtain high-performance flame-retardant epoxy resin(EP),diglycidyl ether of(2,5-dihydroxyphenyl)diphenyl phosphine oxide(DPO-HQ-EP)was synthesized.EP/DPO-HQ-EP samples with varying phosphorus contents were prepared by curing a mixture of DPO-HQEP and diglycidyl ether of bisphenol A.The incorporation of DPO-HQ-EP significantly enhanced the flame retardancy of EP without compromising its glass transition temperature.The EP/DPO-HQ-EP/0.6 exhibited a limited oxygen index of 31.7%and achieved a V-0 rating in the vertical burning test.In the cone calorimeter test,due to the incorporation of DPO-HQ-EP,the peak of heat release rate and total heat release of EP/DPO-HQ-EP/0.6 decreased by 39.4% and 15.9% compared with the values for pure EP.A detailed investigation of the flame-retardant mechanism revealed that the improved flame retardancy of EP/DPO-HQ-EP samples was attributed to the release of phosphorus-containing free radicals and non-flammable gases in the gas phase,as well as the formation of a continuous and dense char layer in the condensed phase.Moreover,the dielectric constant and dielectric loss factor of EP/DPO-HQ-EP samples were lower than those of EP/0.The water absorptivity and transparency of EP were effectively preserved with the incorporation of DPO-HQEP.These findings highlighted the potential of EP/DPOHQ-EP for industrial applications in an electrical field.展开更多
文摘Modified diphenyl oxide resin was synthesized by co-polymerization of unsaturated acid and diphenyl oxide derivants. And then modified bismaleimide resin and expoxide linear phenolic resin were added into modified diphenyl oxide resin to co-polymerize and modify once more. The system was applied in composites. Their properties were investigated and found that they met the requirements as a heat-resisting adhesive.
文摘A fluorescent ternary europium complex containing bis (diphenyl phosphine oxide) methane which functioned as both a neutral and anion ligand, and thenoyltrifluoroacetonato anion was synthesized and characterized by elemental analysis, DTA TG analysis, UV Vis, FT IR and MS spectroscopy. The chemical formula is proved to be Eu(TTA)(MPPO)(HMPPO)·(NO 3)·2H 2O. Its luminescence quantum efficiency(in acetonitrile, 26 3%) is approximately the same as that of the commonly used red emission luminescent compound, Eu(TTA) 3(TPPO) 2 (TPPO is triphenyl phosphine oxide). The new complex has comparatively long fluorescence lifetime.
基金supported by the Shandong Provincial Natural Science Foundation(Grant No.ZR2024MB106).
文摘To obtain high-performance flame-retardant epoxy resin(EP),diglycidyl ether of(2,5-dihydroxyphenyl)diphenyl phosphine oxide(DPO-HQ-EP)was synthesized.EP/DPO-HQ-EP samples with varying phosphorus contents were prepared by curing a mixture of DPO-HQEP and diglycidyl ether of bisphenol A.The incorporation of DPO-HQ-EP significantly enhanced the flame retardancy of EP without compromising its glass transition temperature.The EP/DPO-HQ-EP/0.6 exhibited a limited oxygen index of 31.7%and achieved a V-0 rating in the vertical burning test.In the cone calorimeter test,due to the incorporation of DPO-HQ-EP,the peak of heat release rate and total heat release of EP/DPO-HQ-EP/0.6 decreased by 39.4% and 15.9% compared with the values for pure EP.A detailed investigation of the flame-retardant mechanism revealed that the improved flame retardancy of EP/DPO-HQ-EP samples was attributed to the release of phosphorus-containing free radicals and non-flammable gases in the gas phase,as well as the formation of a continuous and dense char layer in the condensed phase.Moreover,the dielectric constant and dielectric loss factor of EP/DPO-HQ-EP samples were lower than those of EP/0.The water absorptivity and transparency of EP were effectively preserved with the incorporation of DPO-HQEP.These findings highlighted the potential of EP/DPOHQ-EP for industrial applications in an electrical field.
