TY - JOUR
T1 - Novel flame retardancy effects of DOPO-POSS on epoxy resins
AU - Zhang, Wenchao
AU - Li, Xiangmei
AU - Yang, Rongjie
PY - 2011/12
Y1 - 2011/12
N2 - A series of flame retarded epoxy resins (EP) was prepared with a novel polyhedral oligomeric silsesquioxane containing 9,10-dihydro-9-oxa-10- phosphaphenanthrene-10-oxide (DOPO-POSS). The flame retardancy of these EPs was tested by the LOI, UL-94, which indicates that DOPO-POSS has meaningful effects on the flame retardancy of EP composites. 2.5 wt.% DOPO-POSS incorporation into epoxy resin (EP-2.5), results in a LOI value 30.2 and UL-94 V-1 (t1 = 8 s and t2 = 3 s) rating. Moreover, self-extinguishing effect through the pyrolytic gases spurt is observed in UL-94 test for the EP-2.5. The pyrolytic gases and thermal stability of epoxy resins with and without DOPO-POSS were detected by TGA-FTIR under air atmosphere. Releases of gaseous species are found to be similar for the pure EP and EP-2.5. The details of fire behaviour, such as TTI, HRR, p-HRR, TSR, SEA, COPR, CO2PR, and TML, were tested by cone calorimeter. It is notable that 2.5 wt.% DOPO-POSS could make COPR and CO2PR reach a maximum, which could explain the blowing-out extinguishing effect.
AB - A series of flame retarded epoxy resins (EP) was prepared with a novel polyhedral oligomeric silsesquioxane containing 9,10-dihydro-9-oxa-10- phosphaphenanthrene-10-oxide (DOPO-POSS). The flame retardancy of these EPs was tested by the LOI, UL-94, which indicates that DOPO-POSS has meaningful effects on the flame retardancy of EP composites. 2.5 wt.% DOPO-POSS incorporation into epoxy resin (EP-2.5), results in a LOI value 30.2 and UL-94 V-1 (t1 = 8 s and t2 = 3 s) rating. Moreover, self-extinguishing effect through the pyrolytic gases spurt is observed in UL-94 test for the EP-2.5. The pyrolytic gases and thermal stability of epoxy resins with and without DOPO-POSS were detected by TGA-FTIR under air atmosphere. Releases of gaseous species are found to be similar for the pure EP and EP-2.5. The details of fire behaviour, such as TTI, HRR, p-HRR, TSR, SEA, COPR, CO2PR, and TML, were tested by cone calorimeter. It is notable that 2.5 wt.% DOPO-POSS could make COPR and CO2PR reach a maximum, which could explain the blowing-out extinguishing effect.
KW - Cone calorimeter
KW - DOPO-POSS
KW - Epoxy resin
KW - Flame retardancy
KW - TGA
UR - http://www.scopus.com/inward/record.url?scp=80655123182&partnerID=8YFLogxK
U2 - 10.1016/j.polymdegradstab.2011.09.016
DO - 10.1016/j.polymdegradstab.2011.09.016
M3 - Article
AN - SCOPUS:80655123182
SN - 0141-3910
VL - 96
SP - 2167
EP - 2173
JO - Polymer Degradation and Stability
JF - Polymer Degradation and Stability
IS - 12
ER -