2014
DOI: 10.1016/j.polymdegradstab.2014.03.038
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Effect of the addition of tall oil-based polyols on the thermal and mechanical properties of ureaurethane elastomers

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Cited by 38 publications
(42 citation statements)
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“…These peaks correspond to the asymmetric and the symmetric stretching vibration for CH (CH 2 and CH 3 ) . The highest absorbance in the spectra was produced between 1750 and 1735 cm −1 , which was characteristic of the CO stretching . These peaks were more pronounced in the tall oil‐treated paper‐sheets than in the hydrowax‐treated one.…”
Section: Resultsmentioning
confidence: 93%
“…These peaks correspond to the asymmetric and the symmetric stretching vibration for CH (CH 2 and CH 3 ) . The highest absorbance in the spectra was produced between 1750 and 1735 cm −1 , which was characteristic of the CO stretching . These peaks were more pronounced in the tall oil‐treated paper‐sheets than in the hydrowax‐treated one.…”
Section: Resultsmentioning
confidence: 93%
“…The presence of lignin in polyurethane resulted into the formation of a wider band in the 3330-3425 cm -1 region due to merging of the bonded NH band (3330 cm As can be seen in Figures 5a, 5c and 5e the spectra of lignin-containing polyurethanes show that as the lignin content increases, the peak of the carbonyl stretching vibration (around 1700 cm -1 ) gradually shifted to higher wavenumbers. Carbonyl bands of polyurethane can be divided on three main regions: the hydrogen bonded carbonyl in ordered crystalline domains at 1700-1709 cm -1 [19,24,27], the hydrogen bonded carbonyl in disordered amorphous conformations at 1714-1720 cm -1 [19,30] and the free carbonyl groups (non bonded) at 1731-1745 cm -1 [23,31]. The carbonyl band shifting indicates that the presence of lignin induces the change from a hydrogen bonded ordered crystalline domain (PU-CO, PU-MCO1 and PU-MCO2) to a disordered amorphous conformation and to the formation of free carbonyl groups (PU-CO/lignin, PU-MCO1/lignin and PU-MCO2/lignin) [27].…”
Section: Scanning Electron Microscopy (Sem)mentioning
confidence: 99%
“…In Poland, the most common raw material for production of polyols is the rapeseed oil, which is a triglyceride of higher unsaturated fatty acids containing 61% of oleates, 21% of linoleates, 10% of linolenates and 8% of higher saturated fatty acid carboxylates (Lappi and Alén, 2011;Piszczyk, 2011). The rapeseed oil derivatives are also used as reagents in the production of polyamides, polyesters and polyurethanes (Ronda et al, 2013;Wei et al, 2012).…”
Section: Introductionmentioning
confidence: 99%