Synthesis and characterization of novel phosphorous-silicone-nitrogen flame retardant and evaluation of its flame retardancy for epoxy thermosets
Article first published online: 24 JAN 2014
Copyright © 2014 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Special Issue: Polymers for Microelectronics
Volume 131, Issue 24, December 15, 2014
How to Cite
2014), Synthesis and characterization of novel phosphorous-silicone-nitrogen flame retardant and evaluation of its flame retardancy for epoxy thermosets. J. Appl. Polym. Sci., 131, 40412, doi: 10.1002/app.40412, , , and (
- Issue published online: 24 SEP 2014
- Article first published online: 24 JAN 2014
- Manuscript Accepted: 9 JAN 2014
- Manuscript Received: 22 AUG 2013
- flame retardance;
A novel phosphorous-silicone-nitrogen ternary flame retardant (FR), [(1,1,3,3-tetramethyl-1,3-disilazanediyl)di-2,1-ethanediyl]bis(diphenylphosphine oxide) (PSiN) was synthesized with high yield via a one-step procedure by the reaction of diphenylphosphine oxide and vinyl-terminated silazane with triethylborane as the catalyst. The chemical structure of the target compound was confirmed by nuclear magnetic resonances, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, and Flourier transform infrared measurements. The developed PSiN FR was applied in the flame retardancy of o-cresol novolac epoxy (CNE)/phenolic novolac (PN) hardener system. Effects of PSiN on the processability, thermal properties, especially the flame retardancy properties of the composites were investigated. Experimental results revealed that addition of PSiN improved the flowability of the CNE/PN systems, while the thermal stability of the epoxy thermosets was maintained. Meanwhile, the incorporation of PSiN was in favor of the formation of char during the thermal degradation process of the epoxy thermosets. The limited oxygen index of the epoxy system increased along with the PSiN content. An UL 94 V-0 FR rating was achieved when the weight content of PSiN in the epoxy composites reached 20 wt %. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40412.