期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 15, 期 6, 页码 888-893出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2009.09.018
关键词
Recycling of PU; Thermal degradation; Flame retardant
资金
- Kyonggi University
- Kangwon National University
Chemical degradation of used PU was intentionally made by the addition of flame retardants such as tris(2-chloropropyl)phosphate (TCPP), triethyl phosphate (TEP) and trimethyl phosphonate (TMP). Final product obtained after the degradation reaction was named as DEP. The structure of degraded products (DEP) was analyzed by FT-IR and P-31 NMR and it turned out to be phosphorous containing oligourethanes. Rigid polyurethane foam was produced using the degraded products (DEP) as flame retardants. The flammability and thermal stability of recycled rigid polyurethane was investigated. The mechanical properties such as compressive strength and tensile strength of recycled polyurethane were also studied. The recycled polyurethane shows reduced flammability and higher thermal stability over virgin polyurethane. Mechanical strength of recycled polyurethane also shows as high as that of virgin polyurethane. In order to evaluate flame retardant properties of the recycled polyurethane foams with various amounts of DEP, heat release rate (HRR) of the foam was measured by cone calorimeter. Scanning electron micrograph of recycled PU shows uniform cell morphology as virgin-PU. (C) 2009 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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