Spiro-phosphorus (P)-based reactive flame retardant (SPDPT), a novel reactive flame-retardant epoxy resin (EP) curing agent, was prepared through the one-pot synthesis of triacetonediamine, pentaerythritol, and P oxychloride. The successful preparation of SPDPT was confirmed through Fourier-transform infrared (FTIR) spectroscopy, ¹H NMR spectroscopy, ³¹P NMR spectroscopy, and elemental analysis. The flame-retardant epoxy thermoset [e.g., EP/4′4-diaminodiphenyl sulfone (DDS)/SPDPT] was prepared by using DDS as the co-curing agent. Differential scanning calorimetry (DSC) results show that SPDPT can cure EP. Thermogravimetric analysis (TGA) results show that improve the carbon residue yield of the epoxy thermoset after burning. When the P content was 1.0 wt%, the limiting oxygen index value of the EP/DDS/SPDPT-4 sample was 26.4%, and UL94 reached the V-0 rating. The tensile property of the epoxy thermoset reached 37.20 MPa, the flexural property reached 63.82 MPa, and the impact property reached 21.57 KJ⋅m^–2.

通过一锅法合成三丙酮二胺，季戊四醇和三氯氧磷，制备了一种新型的反应型阻燃环氧树脂（EP）固化剂-基于磷（P）的反应型阻燃剂（SPDPT）。SPDPT的成功制备通过傅里叶变换红外（FTIR）光谱，¹ H NMR光谱，³¹P NMR光谱和元素分析。阻燃环氧热固性塑料（例如，EP / 4'4-二氨基二苯砜（DDS）/ SPDPT）是通过使用DDS作为共固化剂来制备的。差示扫描量热法（DSC）结果表明SPDPT可以固化EP。热重分析（TGA）结果表明，燃烧后提高了环氧热固性树脂的碳残留量。当P含量为1.0重量％时，EP / DDS / SPDPT-4样品的极限氧指数值为26.4％，并且UL94达到V-0等级。环氧热固性树脂的拉伸性能达到37.20 MPa，弯曲性能达到63.82 MPa，冲击性能达到21.57 KJ·m ^–2。