Properties of rigid polyurethane foams prepared from recycled aircraft deicing agent with hexamethylene diisocyanate |
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| Authors: | Bao Wang Yan‐Ling Cheng Yuhuan Liu Paul Chen Dong Li Roger Ruan |
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| Affiliation: | 1. Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, Minnesota 55108;2. Department of Agricultural Engineering, College of Engineering, China Agricultural University, Beijing 100083, China;3. Department of Biological Medicine, College of Biochemical Engineering, Beijing Union University, Beijing 100023, China;4. Biomass Energy Center and State Key Laboratory of Food Science, Nanchang University, Jiangxi 330047, China |
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| Abstract: | Polyurethane (PUR) rigid foams were prepared from recycled aircraft deicing agent (aircraft deicing fluid) with reaction of hexamethylene diisocyanate at temperature of 55°C. The effect of [NCO]/[OH] ratio on properties of microscopic structure, cell size distribution, compressive strength, apparent density, as well as thermal conductivity (k) was studied. Higher [NCO]/[OH] ratio helped achieve better micromorphology, higher apparent density, and compressive strength of the PUR foams. With the [NCO]/[OH] ratio of 0.75 and 0.8, some shrinking happened during foam rising, causing a decrease in total volume of the PUR foam, and leading to higher apparent density as well as sharply increased compressive strength. All PUR foams displayed good thermal insulation properties in this study. With [NCO]/[OH] ratio increased from 0.7 to 0.8, the k value increased significantly from 34.3 to 42.2 mW m?1 K?1. The k value here was chiefly governed by the apparent density of the foams, which was in turn a function of the ratio of [NCO]/[OH]. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci., 2013 |
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| Keywords: | compression foams microstructure polyurethanes thermal conductivity |
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