1 Department of Science and Technology, Chinese People's Armed Police Force Academy, Langfang 065000, Hebei, China 2 Graduates Forces, Chinese People's Armed Police Force Academy, Langfang 065000, Hebei, China 3 Department of Fire Protection Engineering, Chinese People's Armed Police Force Academy, Langfang 065000, Hebei, China
The flame retarding and mechanical properties of new flame retardant composites(FR/APP/MH/EP) were studied using limited oxygen index (LOI) measurement,UL-94 and cone test. The new flame retardant composites were prepared by adding nano-magnesium hydroxide(MH) into six-(4-of DOPO hydroxymethyl phenoxy) cyclotriphosphazene (FR),polyphosphate (APP) and epoxy resin(EP). The results show that when fix the FR/APP 1:1, adding 1% mass fraction MH, the limited oxygen index(LOI) value of EP2 (10%FR/10%APP/1%MH/EP) can reach 36.4%, the peak heat release rate (pk-HRR),average effective heat of combustion (av-EHC),average specific extinction area (av-SEA),average CO release rate (av-CO) of EP2 are reduced by 79.8%,6.73%,47.2%,33.3%, respectively, compared with those of pure EP (EP0) and decrease 20.0%,69.6%,83.6%,58.6%, respectively, compared with those of EP1 (10%FR/10%APP/EP),meanwhile, the tensile,bending and impact strengths of EP2 increase 47.6%, 75.2% and 196%, separately, compared with those of EP1.SEM observation reveals that EP2 forms a uniform, compact and continuous charred layers after burning, which has good flame retarding,smoke suppression and the toxic effects.
WANG Zheng-zhou, WANG Yun, HU Yuan Intumescent flame retardation of epoxy resins containing ammonium polyphosphate and pentaerythritol[J]. Polymer Materials Science and Engineering, 2009, 25 (11): 86- 89.
LU Lin-gang, XU Xiao-nan, WANG Da-wei, et al Preparation and flame retardancy of intumescent flame-retardant polypropylene[J]. Acta Materiae Compositae Sinica, 2013, 30 (1): 83- 89.
XIAO Wei-dong, HE Pei-xin, HU Gao-ping, et al Study on the flame-retardance and thermal stability of the acid anhydride-cured epoxy resin flame-retarded by triphenyl phosphate and hydrated alumina[J]. Journal Fire Sciences, 2001, 19 (5): 369- 377.
HUANG F, LIU Y Q, ZHANG X H, et al Effect of elastomeric nanoparticles on toughness and heat resistance of epoxy resins[J]. Macromolecular Rapid Communications, 2002, 23 (13): 786- 790.
MAUERER O New reactive, halogen-free flame retardant system for epoxy resins[J]. Polymer Degradation and Stability, 2005, 88 (1): 70- 73.
WANG C S, LEE M C Synthesis, characterization, and properties of multifunctional naphthalene-containing epoxy resins cured with cyanate ester[J]. Journal of Applied Polymer Science, 1999, 73 (9): 1611- 1622.
TAKAHASHI A, SATSU Y, NAGAI A, et al Heat-resistant epoxy-silicon hybrid materials for printed wiring boards[J]. IEEE Transactions on Electronics Packaging Manufacturing, 2005, 28 (2): 163- 167.
TAKAMATSU Y, DUNMEYER D, THOMAS EL, et al Preparation characterization and heat resistance studies of a holographic photopolymer based on SU-8 epoxy resin[J]. Optics Letters, 2008, 33 (1): 7- 9.
1): 81-86. LI Dao, HU Jing-ping, QIN Yan, et al Combustion behavior and pyrolysis of epoxy resins blended with caged bicyclic dimelamine phosphate[J]. Journal of Functional Polymers, 2007, 19-20 (1): 81- 86.