期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 3, 期 6, 页码 1197-1204出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.5b00170
关键词
Soy-polyol; Polyurethane foam; Epoxidation; Hydroxylation; Microflow system; Oil-water separator
资金
- National Basic Research Program of China (973 Program) [2012CB725204, 2012CB721104]
- National Natural Science Foundation of China [U1463201, 81302632]
- Natural Science Foundation of Jiangsu Province [BK20130913, BY2014005-03]
- Program of Scientific Innovation Research of College Graduates in Jiangsu Province [CXZZ13_0427]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
A soy-polyol labeled Polyol-m was synthesized directly from soybean oil in a continuous microflow system equipped with self-designed oil-water separators and using a reported scheme for epoxidation under following the optimized conditions for hydroxylation: sulfuric acid concentration of 10 wt %, residence time of 13 min, and temperature of 75 degrees C. Another soy-polyol labeled Polyol-f was also synthesized in a conventional flask from commercially available epoxidized soybean oil as a raw material for the purpose of comparison. Polyol-f had a wider molecular weight distribution, higher viscosity, and lower hydroxyl number than Polyol-m because of the more substantial oligomers introduced by oligomerization, which was confirmed by Fourier transform infrared (FTIR) and gel permeation chromatography (GPC). In addition, the corresponding soy-based polyurethane rigid foams labeled PU-m and PU-f were prepared. PU-m had fine, uniform, and closed-cell morphology, and it contained higher cross-linking due to such characteristics as lower viscosity and higher hydroxyl number; these characteristics were beneficial for the foam properties, including compression strength, thermal insulation, dimensional stability, and thermostability.
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