磷腈
环氧树脂
双酚A
环氧氯丙烷
化学
缩水甘油醚
高分子化学
固化(化学)
核化学
有机化学
聚合物
作者
В. В. Киреев,Yulya V. Bilichenko,Р. С. Борисов,Jianxin Mu,Д. А. Кузнецов,Anastasiya V Eroshenko,С. Н. Филатов,И. С. Сиротин
出处
期刊:Polymers
[MDPI AG]
日期:2019-11-20
卷期号:11 (12): 1914-1914
被引量:19
标识
DOI:10.3390/polym11121914
摘要
Phosphazene-containing epoxy oligomers (PEO) were synthesized by the interaction of hexachlorocyclotriphosphazene (HCP), phenol, and bisphenol A in a medium of excess of epichlorohydrin using potassium carbonate and hydroxide as HCl acceptors with the aim of obtaining a product with lower viscosity and higher phosphazene content. PEOs are mixtures of epoxycyclophosphazene (ECP) and a conventional organic epoxy resin based on bisphenol A in an amount controlled by the ratio of the initial mono- and diphenol. According to 31P NMR spectroscopy, pentasubstituted aryloxycyclotrophosphazene compounds predominate in the ECP composition. The relative content in the ECP radicals of mono- and diphenol was determined by the MALDI-TOF mass spectrometry method. The organic epoxy fraction, according to gas chromatograpy-mass spectrometry (GC-MS), contains 50-70 wt % diglycidyl ether of bisphenol A. PEO resins obtained in the present work have reduced viscosity when compared to other known phosphazene-containging epoxy resins while phosphazene content is still about 50 wt %. Resins with an epoxy number within 12-17 wt %, are cured by conventional curing agents to form compositions with flame-retardant properties, while other characteristics of these compositions are at the level of conventional epoxy materials.
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