Synthesis of Bisphenol A Based Phosphazene-Containing Epoxy Resin with Reduced Viscosity

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 P-31 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.

Authors
Kireev V.V.1 , Bilichenko Y.V.1 , Borisov R.S. 2, 3 , Mu J.X.4 , Kuznetsov D.A.5 , Eroshenko A.V.1 , Filatov S.N.1 , Sirotin I.S.1
Number of issue
12
Language
English
Status
Published
Number
1914
Volume
11
Year
2019
Organizations
  • 1 Mendeleev Univ Chem Technol Russia, Dept Plast, Miusskaya Sq 4, Moscow 125047, Russia
  • 2 Russian Acad Sci, Topchiev Inst Petrochem Synth, Leninskii Pr 29, Moscow 119991, Russia
  • 3 Peoples Friendship Univ Russia, Dept Organ Chem, Miklukho Maklaya Str 6, Moscow 117198, Russia
  • 4 Jilin Univ, Coll Chem, 2699 Qianjin St, Changchun 130012, Peoples R China
  • 5 Razvilka SP, Sci & Res Inst Nat Gases & Gas Technol Gazprom VN, Moscow 142717, Russia
Keywords
epoxy resin; epoxy oligomer; phosphazene; bisphenol A; phenol
Date of creation
10.02.2020
Date of change
10.02.2020
Short link
https://repository.rudn.ru/en/records/article/record/56639/
Share

Other records