Abstract
AbstractOptimization of copolymerization conditions for biodegradable polyurethane foam with non‐pretreated liquefied corn stalk and polymethylene polyphenylisocyanate was conducted using a quadratic regression rotational combinational design of response surface methodology. A five‐level four‐factor central composite design was employed to determine the maximum tensile strength at optimum levels for [NCO]/[OH] ratio, blowing agent (water), mass ratio of triethylamine (TL)/dibutyltin dilaurate (DD), and surfactant (silicone). The analysis of variance (ANOVA) of the quadratic orthogonal regression model revealed that the fit of the model was good. The model was also verified by experimentation. The maximum tensile strength of 1.64 MPa was obtained at the optimal conditions: [NCO]/[OH] ratio 0.7, blowing agent concentration 4.7 wt %, surfactant concentration 1.27 wt %, and mass ratio of TL/DD 1: 1. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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