Szolnoki Beáta, Bocz Katalin, Marosi György, Toldy Andrea
Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Budafoki út 8, H-1111 Budapest, Hungary.
Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary.
Polymers (Basel). 2016 Aug 30;8(9):322. doi: 10.3390/polym8090322.
Flame-retarded bioepoxy resins were prepared with the application of commercially available sorbitol polyglycidyl ether (SPE). The additive-type flame retardancy of the cycloaliphatic amine-cured SPE was investigated. Three-percent phosphorus (P)-containing samples were prepared with the application of the liquid resorcinol bis(diphenyl phosphate) (RDP), the solid ammonium polyphosphate (APP), and by combining them. Synergistic effect was found between the inorganic APP and the organophosphorus RDP, when applied in combination: formulations applying RDP or APP alone showed increased limiting oxygen index (LOI) values, however, their UL-94 standard ratings remained HB. When the same amount of P originated from the two additives, V-0, self-extinguishing rating and LOI value of 34% () was reached. By the combined approach the heat release rate of SPE could be lowered by approximately 60%. The assumed balanced solid and gas phase mechanism was confirmed by thermogravimetric analysis, Fourier transform infrared spectrometry (FTIR) analysis (of the gases formed during laser pyrolysis), attenuated total reflection-infrared spectrometry (ATR-IR) analysis (of the charred residues), as well as by mechanical testing (of the char obtained after combustion).
采用市售山梨醇聚缩水甘油醚（SPE）制备了阻燃生物环氧树脂。研究了脂环族胺固化SPE的添加型阻燃性能。通过使用液体间苯二酚双（磷酸二苯酯）（RDP）、固体聚磷酸铵（APP）并将它们组合，制备了含3%磷（P）的样品。无机APP和有机磷RDP组合使用时发现了协同效应：单独使用RDP或APP的配方显示极限氧指数（LOI）值增加，然而，它们的UL-94标准评级仍为HB。当相同量的P来自两种添加剂时，达到了V-0级、自熄评级和34%（）的LOI值。通过组合方法，SPE的热释放速率可降低约60%。热重分析、傅里叶变换红外光谱（FTIR）分析（激光热解过程中形成的气体）、衰减全反射红外光谱（ATR-IR）分析（烧焦残渣）以及机械测试（燃烧后获得的焦炭）证实了假定的平衡固相和气相机理。
