High performance fire-retarded epoxy imparted by a novel phenophosphazine-containing antiflaming compound at ultra-low loading

作者：Luo, Qinqin; Yuan, Yanchao; Dong, Chunlei; Liu, Shumei^*; Zhao, Jianqing^*

来源：Materials Letters, 2016, 169: 103-106.

DOI：10.1016/j.matlet.2016.01.083

• Polymers
• Phosphors
• Epoxy resin
• Flame retardancy
• Intumescent char
• Blowing-out effect

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 4,4'-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 2.5 wt% HD-DPPA, where phosphorus content was as low as 0.19 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.

• 出版日期2016-4-15
• 单位华南理工大学