Rigid polyurethane foams from a polyglycerol-based polyol

Piszczyk, Łukasz; Strankowski, Michał; Danowska, Magdalena; Hejna, Aleksander; Haponiuk, Józef T.

doi:10.1016/j.eurpolymj.2014.05.012

Cited by 62 publications

(53 citation statements)

References 19 publications

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“…The replacement of petrochemical polyol with biopolyol P150 resulted in a decreased volumetric expansion during polymerization which, in turn, caused an increase in the produced material's density in comparison to neat foam. Similar observations associated with the incorporation of bio-based polyols into polyurethane foams have been previously reported (Piszczyk et al 2014). However, the effect related to the use of P150 is rather small due to the low water content of the biopolyol used in this study in comparison to biopolyols described in the literature.…”

Section: Mechanical and Thermal Properties Of Analyzed Polyurethanessupporting

confidence: 86%

Biopolyols obtained via crude glycerol-based liquefaction of cellulose: their structural, rheological and thermal characterization

et al. 2016

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In this work lignocellulose biomass liquefaction was used to produce biopolyols suitable for the manufacturing of rigid polyurethane foams. In order to better evaluate the mechanism of the process, pure cellulose was applied as a raw material. The effect of time and temperature on the effectiveness of liquefaction and the parameters of resulting biopolyols were characterized. The prepared materials were analyzed in terms of their chemical structure, rheology, thermal and oxidative stability, and basic physical and mechanical properties that are important from the point of view of polyurethane manufacturing. The optimal parameters for the biopolyol production with a 94 % yield were achieved at 150°C for a 6-h reaction duration. The obtained polyols were characterized by the hydroxyl number of 643 mg KOH/g and enhanced thermal and oxidative stability compared to the polyols obtained at lower temperatures, which is associated with the altered mechanism of liquefaction. The results of rheological tests, analyzed with the use of Ostwald-de Waele and Herschel Bulkley models, revealed that the prepared biopolyols can be classified as pseudoplastic fluids with the viscosity values similar to those of commercially available products. Rigid foams obtained via partial substitution of petrochemical polyol with prepared biobased one were characterized by slightly increased apparent density and average cell size comparing to unmodified materials. The best mechanical performance was observed for the sample containing 35 wt% of biopolyol in the polyol mixture, which indicates a synergistic effect between the applied polyols. The applied modification delayed thermal degradation of foams due to changes in thermal decomposition process. In conclusion, the presented work confirms that lignocellulose biomass liquefaction can be successfully applied as a manufacturing method of polyols later used in the production of polyurethanes.

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Section: Mechanical and Thermal Properties Of Analyzed Polyurethanessupporting

confidence: 86%

Biopolyols obtained via crude glycerol-based liquefaction of cellulose: their structural, rheological and thermal characterization

et al. 2016

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“…Piszczyk et al [18] received similar FTIR spectra in their work, which was concerned at rigid polyurethane foams from a polyglycerol-based polyol. The cross-sectional surfaces of the prepared poly(etherurethane)s are shown in Fig.…”

Section: Resultsmentioning

confidence: 91%

“…In the case of PU-PEG/BDO and PU-PEG, the thermal decomposition occurs with one stage, respectively, 367 and 373°C. Polyurethanes without phase separation are generally characterized by one-step thermal degradation, which involves simultaneous degradation of hard and soft segments, and it is observed commonly in the case of polyurethanes obtained using multifunctional components (like polyurethane foams) or polyurethanes with high content of soft segments [18,31]. Generally, thermal degradation of polyurethanes occurs in two main steps.…”

Section: Resultsmentioning

confidence: 99%

“…Renewable substances proposed for the synthesis of polymers are, for example, vegetable oils (e.g., linseed oil, sunflower oil, palm oil, cotton oil, soybean oil, tung oil, cashew nut oil [5][6][7][8]), glycerol and its derivatives [9,10], terpenes [11] and rosin [12,13]. The bio-based components, which can be used as a polyols in the synthesis of polyurethanes, are, for example, castor oil [14], polyricinoleate diol [15], hydroxylated soybean oil [6,16], hydroxylated hemp seed oil [17] and polyglycerols [18]. Bio-based trends are also visible in the synthesis of isocyantes [19].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, structure and properties of poly(ether-urethane)s synthesized using a tri-functional oxypropylated glycerol as a polyol

Datta

Kosiorek

Włoch

2016

J Therm Anal Calorim

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The main aim of this work was to obtain poly(ether-urethane)s using tri-functional polyoxyalkylene polyol (Rokopol G1000), which introducing the chemical cross-links into the structure of polyurethanes. Poly(etherurethane)s were prepared using two-step method, called prepolymer method, which involves in the first step the reaction of 4,4 0 -diphenylmethane diisocyanate (MDI) and tri-functional polypropylene glycol glycerol triether polyol. In the second step, prepolymer chains were extended by using: 1,6-hexanediol, 1,4-butanediol in the mixture with poly(ethylene glycol) and poly(ethylene glycol). The prepolymer chains extending was realized at three different molar ratios of NCO groups (presented in prepolymer) to OH groups (presented in chain extender), i.e., 0.95, 1.00 or 1.05. The influence of chain extender type on the chemical structure, selected mechanical properties and thermomechanical properties of the obtained poly(ether-urethane)s was investigated. The results showed that applying different types of chain extenders results in obtaining materials with diversified mechanical properties, but very similar thermal stability. The performance of obtained poly(etherurethane)s is mostly affected by the chemical cross-links, which were introduced into soft segments by tri-functional polyetherol.

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“…During our own research [28], two types of commercially available polyglycerols from Eco Innova, produced according to previously mentioned patent [22] were used. In Table 1 there are presented properties of foams obtained by replacement of 35 and 70 wt % of commercial Rokopol RF551 by polyglycerols Pole and PGK.…”

Section: Recent Developments In Polyurethane Foams Containing Low-cosmentioning

confidence: 99%

Recent Developments in Polyurethane Foams Containing Low-Cost and Pro-Ecological Modifiers

Kosmela¹,

Zedler²,

Formela³

et al. 2016

ChChT

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Abstract. Diversity of the polyurethane (PU) foams applications cause that investigation of the relationships between their structure and properties is currently very popular topic among the many research institutions and companies. At the turn of the last years many scientific papers about PU foams and their composites were published. The one of the main research trends in this field is related to the reduction of production costs of PU foams. This aim can be successfully achieved through the incorporation of raw materials of natural origin or the utilization of waste materials. This work reviews the progress and recent developments in area of PU foams containing low-cost and pro-ecological modifiers, such as crude glycerol, liquefied biomass, ground tire rubber, etc.

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Rigid polyurethane foams from a polyglycerol-based polyol

Cited by 62 publications

References 19 publications

Biopolyols obtained via crude glycerol-based liquefaction of cellulose: their structural, rheological and thermal characterization

Biopolyols obtained via crude glycerol-based liquefaction of cellulose: their structural, rheological and thermal characterization

Synthesis, structure and properties of poly(ether-urethane)s synthesized using a tri-functional oxypropylated glycerol as a polyol

Recent Developments in Polyurethane Foams Containing Low-Cost and Pro-Ecological Modifiers

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