2008
DOI: 10.1007/bf03218852
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Synthesis and characterization of novel polyurethanes based on 4-{(4-hydroxyphenyl)iminomethyl}phenol

Abstract: Four novel polyurethanes were prepared from 4-{(4-hydroxyphenyl)iminomethyl}phenol by reactions with two aromatic diisocyanates, 4,4'-diphenylmethane diisocyanate and toluene 2,4-diisocyanate, and two aliphatic diisocyanates, isophorone diisocyanate and hexamethylene diisocyanate. The polyurethanes formed were characterized by UV-vis, fluorescence, FT-IR, 1 H-NMR, 1 3 C-NMR, differential scanning calorimetry, thermogravimetry, and X-ray diffraction. The polymers were semi-crystalline and all polymers were solu… Show more

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Cited by 54 publications
(28 citation statements)
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“…Beyond 300 • C, the different polyurethanes show somewhat different degradation behavior. The thermal stability trend of MDI > HDI > TDI is consistent with the data on other polyurethanes reported in the literature (Raghu et al, 2008;Wei, Cheng, Li, & Yu, 2009). Note that the TGA curves for microwave heated and conventionally heated ␤-CD/TDI and ␤-CD/HDI are similar.…”
Section: Thermogravimetric Analysis (Tga)supporting
confidence: 87%
“…Beyond 300 • C, the different polyurethanes show somewhat different degradation behavior. The thermal stability trend of MDI > HDI > TDI is consistent with the data on other polyurethanes reported in the literature (Raghu et al, 2008;Wei, Cheng, Li, & Yu, 2009). Note that the TGA curves for microwave heated and conventionally heated ␤-CD/TDI and ␤-CD/HDI are similar.…”
Section: Thermogravimetric Analysis (Tga)supporting
confidence: 87%
“…The FT-IR spectra of linear and crosslinked polyurethane samples show a broad and relatively symmetric peak at about 3,335 cm −1 due to the hydrogen bonded N-H stretching [22]. The distribution of the carbonyl peak indicates a degree of hydrogen-bonding of the urethane carbonyl group by interactions between different segments.…”
Section: Resultsmentioning
confidence: 97%
“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Thermal insulation property is mainly determined by the types of blowing agent added in the system. Trichlorofluoromethane (CFC) and HCFC-141b have offered the rigid PUF a good thermal insulation as blowing agents.…”
Section: Introductionmentioning
confidence: 99%