| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8017493 | Materials Letters | 2016 | 10 Pages |
Abstract
A novel phenophosphazine-containing compound, HD-DPPA, was successfully synthesized via the addition reaction between 5,10-dihydro-phenophosphazinine-10-oxide and Schiff base obtained in advance by condensation of 4,4â²-dimninodiphenylmethane (DDM) and 4-hydroxybenzaldhehyde, and used as a co-curing agent of DDM and a flame retardant for DGEBA epoxy resin. The cured epoxy resin passed UL-94 V-0 rating with limiting oxygen index (LOI) of 31.3% at only 2.5Â wt% HD-DPPA, where phosphorus content was as low as 0.19Â wt%. The formation of intumescent char layer and blowing-out effect during combustion are responsible for high flame retardancy of epoxy resin. The flame-retarded epoxy resin exhibited the improved tensile and impact strength compared with the pristine epoxy resin.
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Authors
Qinqin Luo, Yanchao Yuan, Chunlei Dong, Shumei Liu, Jianqing Zhao,