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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.18 [2011] >
IJCT Vol.18(2) [March 2011] >
| Title: | Studies on fire and toxicity potential of bromo-butyl rubber of respiratory mask in a simulated closed environment |
| Authors: | Kannan, G K
Kumar, N S |
| Keywords: | Bromo-butyl rubber
Emission
Fire
Toxicity
Respiratory mask |
| Issue Date: | Mar-2011 |
| Publisher: | CSIR |
| Abstract: | This study aimed at evaluation of emission
and fire characteristics of bromo-butyl rubber in closed and cone calorimetric
conditions. Time to ignition was 30 s in cone calorimeter combustion, and flame
out occurred at 315 s. Peak heat release rate (806.34 kW/m2)
occurred at 68 s. CO and CO2 started to build up at 40 s. In closed
environment, peak pressure build up was gradually raising from the negative
pressure (-200 mbar) conditions, to highest positive pressure conditions (400
mbar). Temperature rise observed to be 10.5-21°C. Peak CO
emissions ranged from 34-55 ppm in case of positive pressure experiments. In
TGA study, Tmax was 440°C
where 73% weight loss observed. Major observed emissions of bromo-butyl rubber were
water vapour, CO, NO, CH4 and CO2. Risk hazard of
bromo-butyl rubber based on flashover propensity, was high risk (x = 26.87) and based on total heat
release was intermediate risk (y =
77.9) category. Computed toxicity index was very low in open controlled environment
(0.02) and closed environment (0.06-0.18) conditions. |
| Page(s): | 152-160 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.18(2) [March 2011]
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