2010, Volume 12, Issue 2
Strategic Study of CAE >> 2010, Volume 12, Issue 2
Applied study on pyrolysis of bisphenol A diphosphate flame-retarded ABS
Fire Protection Department, College of Chinese People Armed Police Force, Langfang, Hebei 065000, China
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Abstract
Physical performances, the limiting oxygen index (LOI), vertical combustion performances (UL94), flame retardant performances, smoke release of bisphenol A diphosphate (BDP), BDP/APP and BDP/SiO2 added in ABS are studied. The experimental results showed that BDP added in phenolic resin (NP) can increase char quality. As BDP/NP= 20 %/5 % was added in ABS, the maximum reduction parameter of physical performances is impact strength, which was reduced by 12.00 %, and the ABS resins passed the UL94V-0 test, LOI reached 29.50 %. CONE data showed that its average heat rate (av-HRR) and peak heat rate (pk-HRR) reduced by 46.40 %and 40.45 %, ignition time(TTI ) increased 30 s, flame growth index(FGI) reduced by 50.75 %, average smoke extinction area(SEA) increased by 31.30 % in 6 minute, char ratio was 7.19 % at 600 ℃. When the BDP/NP /APP=20 %/5 %/5 % was added in ABS, ABS resins passed the UL94V-0 test, LOI reached 31.10 %, its reduction range of impact strength was 36.00 %, av-HRR and pk-HRR reduced by 50.11 %and 55.58 %, TTI increased 35 s, FGI reduced by 64.32 %, av-SEA increased by 11.14 % in 6 minute, char ratio was11.15 % at 600 ℃. Adding BDP//NP / SiO2 =20 %/5 %/7 %BDP into ABS resin, its impact strength increased by 20.00 %, the ABS resins also passed the UL94V-0 test, LOI reached 31.20 %, av-HRR and pk-HRR reduced by 49.45 % and 58.09 %, TTI increased 45 s, FGI reduced by 68.34 %, av-SEA increased by 13.00 % in 6 minute, char ratio was 16.37 % at 600 ℃. ABS resin added BDP/NP (20 %/5 %) and nanometer SiO2(7 %) has the best flame retarded and suppression smoke effect and the smallest influence on physical performances.
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