vious study [Nassar et al. 2010]. Commercial methylene diphenyl diisocyanate
(Dow Chemical Company, USA), Polyethylene glycol is a laboratory grade; N,Ndicyclohexaylamine
catalyst (Dow Chemical Company, USA), silicon surfactant, and
distilled water as blowing agent were used.
vious study [Nassar et al. 2010]. Commercial methylene diphenyl diisocyanate(Dow Chemical Company, USA), Polyethylene glycol is a laboratory grade; N,Ndicyclohexaylaminecatalyst (Dow Chemical Company, USA), silicon surfactant, anddistilled water as blowing agent were used.
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