Mechanical, Thermal Properties and Stability of Rigid Polyurethane Foams Produced with Crude-Glycerol Derived Biomass Biopolyols

Jasiūnas, Lukas; Mckenna, Sean Thomas; Bridžiuvienė, Danguolė; Miknius, Linas

doi:10.1007/s10924-020-01686-y

Cited by 24 publications

(16 citation statements)

References 41 publications

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“…Figure 11 shows the thermogravimetric (TGA) and derivative thermogravimetric (DTG) curves of PUR foams. The first stage of decomposition starts between 150 and 220 • C and it refers to the decomposition of isocyanate groups and pyranose rings [68,69]. In this study, the first degradation stage of PUR foams occurred at ~210 • C for WS-0% and 208, 210, 212 • C for WS-10%, WS-20%, and WS-30%.…”

Section: Dynamic Mechanical Analysis (Dma) Of Pur Foamsmentioning

confidence: 59%

Application of Walnut Shells-Derived Biopolyol in the Synthesis of Rigid Polyurethane Foams

2020

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This study aimed to examine rigid polyurethane (PUR) foam properties that were synthesized from walnut shells (WS)-based polyol. The Fourier Transform Infrared Spectroscopy (FTIR) results revealed that the liquefaction of walnut shells was successfully performed. The three types of polyurethane (PUR) foams were synthesized by replacement of 10, 20, and 30 wt% of a petrochemical polyol with WS-based polyol. The impact of WS-based polyol on the cellular morphology, mechanical, thermal, and insulating characteristics of PUR foams was examined. The produced PUR foams had apparent densities from 37 to 39 kg m−3, depending on the weight ratio of WS-based polyol. PUR foams that were obtained from WS-based polyol exhibited improved mechanical characteristics when compared with PUR foams that were derived from the petrochemical polyol. PUR foams produced from WS-based polyol showed compressive strength from 255 to 310 kPa, flexural strength from 420 to 458 kPa, and impact strength from 340 to 368 kPa. The foams that were produced from WS-based polyol exhibited less uniform cell structure than foams derived from the petrochemical polyol. The thermal conductivity of the PUR foams ranged between 0.026 and 0.032 W m−1K−1, depending on the concentration of WS-based polyol. The addition of WS-based polyol had no significant influence on the thermal degradation characteristics of PUR foams. The maximum temperature of thermal decomposition was observed for PUR foams with the highest loading of WS-based polyol.

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Section: Dynamic Mechanical Analysis (Dma) Of Pur Foamsmentioning

confidence: 59%

Application of Walnut Shells-Derived Biopolyol in the Synthesis of Rigid Polyurethane Foams

2020

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“…It has been shown, that as the [NCO]/[OH] ratio increased from 0.6 to 1.2, the LSBP-PU foams with the less regular structure deteriorated mechanical performances were produced. In another study, rigid polyurethane foams of significant renewable content (up to 50%) were produced using biomass biopolyols obtained via crude-glycerol mediated solvothermal liquefaction of sugar beet pulp and commercial diphenylmethane diisocyanate [25]. The produced foams exhibited higher apparent densities 43-160 kg m −3 and compressive strengths 34-254 kPa compared to tested commercial analogues.…”

Section: Introductionmentioning

confidence: 99%

Rigid Polyurethane Foams Reinforced with POSS-Impregnated Sugar Beet Pulp Filler

2020

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Rigid polyurethane (PUR) foams were reinforced with sugar beet pulp (BP) impregnated with Aminopropylisobutyl-polyhedral oligomeric silsesquioxanes (APIB-POSS). BP filler was incorporated into PUR at different percentages—1, 2, and 5 wt.%. The impact of BP filler on morphology features, mechanical performances, and thermal stability of PUR was examined. The results revealed that the greatest improvement in physico-mechanical properties was observed at lower concentrations (1 and 2 wt.%) of BP filler. For example, when compared with neat PUR foams, the addition of 2 wt.% of BP resulted in the formation of PUR composite foams with increased compressive strength (~12%), greater flexural strength (~12%), and better impact strength (~6%). The results of thermogravimetric analysis (TGA) revealed that, due to the good thermal stability of POSS-impregnated BP filler, the reinforced PUR composite foams were characterized by better thermal stability—for example, by increasing the content of BP filler up to 5 wt.%, the mass residue measured at 600 °C increased from 29.0 to 31.9%. Moreover, the addition of each amount of filler resulted in the improvement of fire resistance of PUR composite foams, which was determined by measuring the value of heat peak release (pHRR), total heat release (THR), total smoke release (TSR), limiting oxygen index (LOI), and the amount of carbon monoxide (CO) and carbon dioxide (CO2) released during the combustion. The greatest improvement was observed for PUR composite foams with 2 wt.% of BP filler. The results presented in the current study indicate that the addition of a proper amount of POSS-impregnated BP filler may be an effective approach to the synthesis of PUR composites with improved physico-mechanical properties. Due to the outstanding properties of PUR composite foams reinforced with POSS-impregnated BP, such developed materials may be successfully used as thermal insulation materials in the building and construction industry.

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“…The industrial aromatic polyester polyols which have high hydroxyl number are not compatible with a high percentage of cyclopentane. 26,29…”

Section: Introductionmentioning

confidence: 99%

“…The industrial aromatic polyester polyols which have high hydroxyl number are not compatible with a high percentage of cyclopentane. 26,29 Although the outstanding companies in the polyurethane industry such as Bayer and Dow chemical start to produce new products based on plant oil for RPUFs, the performance evaluation of RPUFs revealed that synthesized biobased polyols could work in appliance only when they were mixed with polyether polyols. Due to the triglycerides structure of plant oils, toughness of RPUFs can increase and their hardness can decrease.…”

Section: Introductionmentioning

confidence: 99%

High performance biobased pour-in-place rigid polyurethane foams from facile prepared castor oil-based polyol: Good compatibility with pentane series blowing agent

Omrani

2021

Journal of Cellular Plastics

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In this paper, biobased and environmentally friendly rigid polyurethane foams (RPUF) from high hydroxyl value castor oil-based polyols have been prepared without the addition of petroleum-based polyols in the formulation. The new Biopolyol with high hydroxyl value was designed on the basis of the analysis of functionality, structure and hydroxyl value relation and synthesized directly from castor oil in a facile one-pot three-step system. A series of Biopolyols with hydroxyl values in the range of 550–650 mg KOH/g were obtained through transesterification, epoxidation, and hydrolysis. The Biopolyol chemical structure was characterized using FT-IR,1H NMR spectroscopies. The formulated blend polyol with amine catalysts and cyclopentane as a blowing agent have good cyclopentane solubility and phase separation between cyclopentane and polyol was not observed after 30 days. The foaming characteristics were evaluated and improved results were obtained. The thermal conductivity, thermal stability, compressive strength, morphology, dimensional stability, density, and foam flow of the RPUFs were characterized. The results are compared with RPUF prepared using standard commercial polyether polyols for pour-in-place RPUFs. The prepared biobased RPUFs from Biopolyol was able to reach the required satisfactory properties for the appliance industry.

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Mechanical, Thermal Properties and Stability of Rigid Polyurethane Foams Produced with Crude-Glycerol Derived Biomass Biopolyols

Cited by 24 publications

References 41 publications

Application of Walnut Shells-Derived Biopolyol in the Synthesis of Rigid Polyurethane Foams

Application of Walnut Shells-Derived Biopolyol in the Synthesis of Rigid Polyurethane Foams

Rigid Polyurethane Foams Reinforced with POSS-Impregnated Sugar Beet Pulp Filler

High performance biobased pour-in-place rigid polyurethane foams from facile prepared castor oil-based polyol: Good compatibility with pentane series blowing agent

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