Effect of the addition of tall oil-based polyols on the thermal and mechanical properties of ureaurethane elastomers

Pietrzak, Kamila; Kirpļuks, Miķelis; Cābulis, Uģis; Ryszkowska, Joanna

doi:10.1016/j.polymdegradstab.2014.03.038

Cited by 38 publications

(42 citation statements)

References 44 publications

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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%

Utilization of different tall oils for improving the water resistance of cellulosic fibers

Hosseinpourpia

Αδαμόπουλος

Parsland

2018

J of Applied Polymer Sci

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This study was conducted to assess the effect of the pulping by‐products crude tall oil (CTO), distilled tall oil (DTO), and tall oil fatty acid (TOFA) on dynamic water vapor sorption behavior, interfiber strength, and thermal stability of cellulosic paper‐sheets. The results were compared against those obtained in cellulose papers treated with the conventional petroleum‐derived hydrophobic agent hydrowax and in untreated ones. The tall oil treatments caused strong reduction in equilibrium moisture content of the paper‐sheets during adsorption and desorption runs. The same trend was noticed for the hydrowax‐treated papers, however, it was less pronounced than the CTO‐treated and DTO‐treated samples in the relative humidity range of 75–95%. The sorption hysteresis was considerably decreased after the treatments. The ultimate dry‐tensile strengths of the paper‐sheets were significantly reduced by TOFA and hydrowax treatments, while CTO and DTO showed comparable strength as that of untreated control. The ultimate wet‐strengths of the paper‐sheets were improved after the treatments. The thermal stability of the specimens was improved by the tall oil treatments, and the hydrowax‐treated samples illustrated lower degradation temperature than the untreated control. The results are promising for the use of tall oils as alternative hydrophobic agents of cellulosic fiber‐based products, such as wood panels and paper packaging. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47303.

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Section: Resultsmentioning

confidence: 93%

Utilization of different tall oils for improving the water resistance of cellulosic fibers

Hosseinpourpia

Αδαμόπουλος

Parsland

2018

J of Applied Polymer Sci

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“…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%

Bio-based polyurethane prepared from Kraft lignin and modified castor oil

Tavares¹,

Boas²,

Schleder³

et al. 2016

Express Polym. Lett.

115

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Abstract. Current challenges highlight the need for polymer research using renewable natural sources as a substitute for petroleum-based polymers. The use of polyols obtained from renewable sources combined with the reuse of industrial residues such as lignin is an important agent in this process. Different compositions of polyurethane-type materials were prepared by combining technical Kraft lignin (TKL) with castor oil (CO) or modified castor oil (MCO1 and MCO2) to increase their reactivity towards diphenylmethane diisocyanate (MDI). The results indicate that lignin increases the glass transition temperature, the crosslinking density and improves the ultimate stress especially for those prepared from MCO2 and 30% lignin content from 8.2 MPa (lignin free) to 23.5 MPa. Scanning electron microscopy (SEM) micrographs of rupture surface after uniaxial tensile tests show ductile-to-brittle transition. The results show the possibility to develop polyurethane-type materials, varying technical grade Kraft lignin content, which cover a wide range of mechanical properties (from large elastic/low Young modulus to brittle/high Young modulus polyurethanes).

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“…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%

Preparation and characterisation of rigid polyurethane foams using a rapeseed oil-based polyol

Zieleniewska

Leszczyński

Kurańska

et al. 2015

Industrial Crops and Products

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145

100

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Effect of the addition of tall oil-based polyols on the thermal and mechanical properties of ureaurethane elastomers

Cited by 38 publications

References 44 publications

Utilization of different tall oils for improving the water resistance of cellulosic fibers

Utilization of different tall oils for improving the water resistance of cellulosic fibers

Bio-based polyurethane prepared from Kraft lignin and modified castor oil

Preparation and characterisation of rigid polyurethane foams using a rapeseed oil-based polyol

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