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http://hdl.handle.net/123456789/467
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| Title: | Calculation of Blowing Agents and the Flammability Characteristics of rigid Polyurethane Foam (RPUF) |
| Authors: | Singh, Harpal |
| Keywords: | 2008
Blowing agents
Rigid polyurethane foam |
| Issue Date: | 19-Oct-2011 |
| Abstract: | Rigid polyurethane foam (RPUF) is one of the most important and versatile insulation
materials for building industry. Flammability performance evaluation of RPUF with
respect to blowing agent contents is very important from the fire safety point of view.
Thus, this paper deals with the calculated quantities of blowing agents for the
formulation and their effect on the flammability characteristics of rigid polyurethane
foam. RPUF samples were prepared from crude 4, 4’-diphenylmethane diisocyanate
(CMDI), polyether polyol, triethylene diamine (TED), 1, 4-butane diol, polysiloxane
ether, methylene chloride and water. The density of RPUF samples was measured
according to ASTM D1622. The density of RPUF samples blown by calculated
quantities of chemical blowing agent, physical blowing agent and mixture of chemical
and physical blowing agents was ranged from 240.1 to 33.4 kg/m3 with an increase of
blowing agent contents. The flammability performance of RPUF samples was
investigated with BS: 4735. The flammability results indicate that extent burnt and
percent mass loss (PML) were unchanged however, burning rate decreases and
burning time increases as the density increased. The increasing quantity of chemical
blowing agent increases the burning rate and decreases the burning time but does not
have any effect on the extent burnt and PML of RPUF samples. It is concluded that
the calculated quantity of chemical blowing agent directly affects the density and
flammability characteristics of RPUF samples. |
| Description: | Conference on Challenges and Applications of Mathematical Modeling Techniques in Building Science and Technology (CAM2TBST), Central Building Research Institute, Roorkee, Vol. II, pp. 511-520, February 7-8, 2008 |
| URI: | http://hdl.handle.net/123456789/467 |
| Appears in Collections: | Published Articles
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