Accelerated ageing and degradation characteristics of rigid polyurethane foam

Yarahmadi, Nazdaneh; Vega, Alberto; Jakubowicz, Ignacy

doi:10.1016/j.polymdegradstab.2017.03.012

Cited by 63 publications

(32 citation statements)

References 9 publications

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“…6 there are presented FTIR spectra of rigid PUR foams subjected to photo-oxidative and thermo-oxidative aging in order to determine the influence of these processes on the chemical structure of analyzed materials. Obtained results are similar to those described by other researchers [50]. Both methods of aging result in the significant decrease of the intensity or even disappearance of the signal attributed to the vibrations of N=C=O groups around 2260-2280 cm − 1 .…”

Section: Photo-oxidative and Thermo-oxidative Agingsupporting

confidence: 90%

“…This is due to the well-known effect of expanding polyurethane foams with simultaneous loss of weight after heating. Thermal degradation includes physical processes (volatile compounds release) and chemical (chain cleavage, oxidation, depolymerization) [50]. Figure 7 shows the compressive strength values at 20% deformation and the apparent density for aged foams and non-aged foams.…”

Section: Photo-oxidative and Thermo-oxidative Agingmentioning

confidence: 99%

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The Study on Application of Biopolyols Obtained by Cellulose Biomass Liquefaction Performed with Crude Glycerol for the Synthesis of Rigid Polyurethane Foams

et al. 2017

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In this work rigid polyurethane foams (PUR) were obtained by replacement of 0-70 wt% of petrochemical polyol with biopolyol obtained via cellulose liquefaction in presence of crude glycerol. The foams with different content of a bio-polyol were prepared by single step method for NCO/OH ratio equals 1.5. The prepared materials were analyzed in terms of their morphology, chemical structure, thermal stability and basic physical and mechanical properties. The effects of photo-oxidative and thermo-oxidative aging on chemical structure, apparent density and mechanical properties of the biomass based rigid polyurethane foams were investigated and discussed.

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Section: Photo-oxidative and Thermo-oxidative Agingsupporting

confidence: 90%

Section: Photo-oxidative and Thermo-oxidative Agingmentioning

confidence: 99%

The Study on Application of Biopolyols Obtained by Cellulose Biomass Liquefaction Performed with Crude Glycerol for the Synthesis of Rigid Polyurethane Foams

et al. 2017

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“…shows FTIR spectra of rigid PUR/PIR foams subjected to thermal-and photo-oxidation processes to determine the effect of these processes on the chemical structure of the materials analyzed. The results are similar to those reported by other researchers [54]. Photo-oxidative aging produces a new band near 1770 cm −1 which indicates the formation of carbonyl groups by oxidation.…”

Section: Photo-oxidative Aging Of Rigid Pur/pir Foamssupporting

confidence: 92%

The Influence of Substitution of a Phosphorus-Containing Polyol with the Bio-polyol on the Properties of Bio-based PUR/PIR Foams

2018

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In this work, effects of incorporating of a phosphorus-containing polyol into rigid polyurethane/polyisocyanurate foams' formulations developed with use of two different bio-based polyols, derived from crude glycerol or liquefied cellulose were examined. The bio-polyol derived from crude glycerol was synthesized via two-step process from crude glycerol and castor oil, whereas the bio-polyol derived from liquefied cellulose was prepared in lignocellulose biomass liquefaction process. Rigid polyurethane/polyisocyanurate foams were prepared by substitution 25, 50, 75 and 100 wt% of a bio-polyol with the phosphorus-containing polyol. Density, compressive modulus, thermal stability and chemical and cellular structure content of the PUR/PIR foams were studied. Cell morphology was also observed by scanning electron microscopy. Furthermore, thermal stability and flammability were investigated. The results show that the phosphorus-based polyol favors some PUR/ PIR foams properties such as fire retardancy, what was expected, but also compressive strength behavior.

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“…The other bands presented in Figure 8 are characteristic of individual components. Absorbance bands in the range of 1595 cm −1 in polyurethane confirmed the presence of aromatic rings derived from isocyanate [58]. The lack of this absorbance band in the case of PIR foam with the simultaneous appearance of the band at 1403cm −1 confirmed the formation of isocyanate group trimerization products [57].…”

Section: Principal Component Analysismentioning

confidence: 71%

Study on the Structure-Property Dependences of Rigid PUR-PIR Foams Obtained from Marine Biomass-Based Biopolyol

et al. 2020

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The paper describes the preparation and characterization of rigid polyurethane-polyisocyanurate (PUR-PIR) foams obtained with biopolyol synthesized in the process of liquefaction of biomass from the Baltic Sea. The obtained foams differed in the content of biopolyol in polyol mixture (0–30 wt%) and the isocyanate index (IISO = 200, 250, and 300). The prepared foams were characterized in terms of processing parameters (processing times, synthesis temperature), physical (sol fraction content, apparent density) and chemical structure (Fourier transform infrared spectroscopy), microstructure (computer microtomography), as well as mechanical (compressive strength, dynamic mechanical analysis), and thermal properties (thermogravimetric analysis, thermal conductivity coefficient). The influence of biopolyol and IISO content on the above properties was determined. The addition of up to 30 wt% of biopolyol increased the reactivity of the polyol mixture, and the obtained foams showed enhanced mechanical, thermal, and insulating properties compared to foams prepared solely with petrochemical polyol. The addition of up to 30 wt% of biopolyol did not significantly affect the chemical structure and average cell size. With the increase in IISO, a slight decrease in processing times and mechanical properties was observed. As expected, foams with higher IISO exhibited a higher relative concentration of polyisocyanurate groups in their chemical structure, which was confirmed using principal component analysis (PCA).

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Accelerated ageing and degradation characteristics of rigid polyurethane foam

Cited by 63 publications

References 9 publications

The Study on Application of Biopolyols Obtained by Cellulose Biomass Liquefaction Performed with Crude Glycerol for the Synthesis of Rigid Polyurethane Foams

The Study on Application of Biopolyols Obtained by Cellulose Biomass Liquefaction Performed with Crude Glycerol for the Synthesis of Rigid Polyurethane Foams

The Influence of Substitution of a Phosphorus-Containing Polyol with the Bio-polyol on the Properties of Bio-based PUR/PIR Foams

Study on the Structure-Property Dependences of Rigid PUR-PIR Foams Obtained from Marine Biomass-Based Biopolyol

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