Mechanical and Thermal Properties of High-Density Rigid Polyurethane Foams from Renewable Resources

Kirpļuks, Miķelis; Cābulis, Uģis; Ivdre, Aiga; Kurańska, Maria; Zieleniewska, Milena; Auguścik, Monika

doi:10.7569/jrm.2015.634132

Cited by 36 publications

(22 citation statements)

References 3 publications

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“…Aromatic polyester polyol based on RO and PET (RO/PET polyol, OH = 408 mg KOH/g) with RO/PET molar ratio 1:4 was synthesized, as described in our previous work [30]. Three base polyols for reference foams were chosen: aliphatic polyether polyol Lupranol 3300 (OH = 400 mg KOH/g, functionality f = 3) from BASF; aromatic polyester polyol Neopolyol 380 (OH = 370 mg KOH/g, f = 3.3 [4]) based on industrial PET waste and purchased from NEO Group (Lithuania); and RO/triethanolamine (RO/TEA) polyol (OH = 373 mg KOH/g, f = 2.6 [4]), which was synthesized by Latvian State Institute of Wood Chemistry via RO transesterification with TEA, and contains long dangling chains in its structure.…”

Section: Methodsmentioning

confidence: 99%

“…Over the past few decades, oils and fats of vegetable origin have served as a viable alternative to petroleum resources [3]. Researchers have managed to obtain PUR materials with up to 20%-35% of renewable material content [4]. Polyols from vegetable oils, such as soybean [5,6], castor [7,8], palm oils [9,10], sunflower [11,12], and rapeseed oil (RO) [13,14] have been synthesized and investigated as alternatives to petrochemical polyols in the production of PURs.…”

Section: Introductionmentioning

confidence: 99%

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Rigid Polyurethane Foams with Various Isocyanate Indices Based on Polyols from Rapeseed Oil and Waste PET

et al. 2020

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Developing polyols derived from natural sources and recycling materials attracts great interest for use in replacing petroleum-based polyols in polyurethane production. In this study, rigid polyurethane (PUR) foams with various isocyanate indices were obtained from polyols based on rapeseed oil and polyethylene terephthalate (RO/PET). The various properties of the prepared PUR foams were investigated, and the effect of the isocyanate index was evaluated. The closed-cell content and water absorption were not impacted by the change of the isocyanate index. The most significant effect of increasing the isocyanate index was on the dimensional stability of the resulting foams. This is due to the increased crosslink density, as evidenced by the increased formation of isocyanurate and increase of the glass transition temperature. Additionally, the influence on compression strength, modulus, and long-term thermal conductivity were evaluated and compared with reference PUR foams from commercially available polyols. Rigid PUR foams from RO/PET polyol were found to be competitive with reference materials and could be used as thermal insulation material.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rigid Polyurethane Foams with Various Isocyanate Indices Based on Polyols from Rapeseed Oil and Waste PET

et al. 2020

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“…A modification of vegetable oils in order to introduce reactive hydroxyl groups can be carried out by means of various methods. These methods are mostly based on the conversion of double bonds into hydroxyl groups [17] or transesterification and transamidization reactions [18][19][20][21]. The structure of a bio-polyol, viscosity, molecular weight and hydroxyl value have a significant impact on the foaming process of a PUR system and consequently on the cellular structure and properties of PUR foams [22].…”

Section: Introductionmentioning

confidence: 99%

Influence of Chemical Structure of Petrochemical Polyol on Properties of Bio-polyurethane Foams

Prociak

Szczepkowski²,

Ryszkowska

et al. 2019

J Polym Environ

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In this study, the influence of the chemical structures of petrochemical polyols on the foaming process of polyurethane compositions as well as on selected properties of the foams obtained has been investigated. Two types of petrochemical polyols were used-polyester and polyether polyols as well as their blends with a rapeseed oil-based polyol. Dielectric polarization, temperature and expansion velocity were determined during the foaming process of the polyurethane systems with different polyol components. The results show the highest reactivity of the polyester polyol and a decrease of the polyurethane system's reactivity as a result of a partial replacement of the petrochemical polyol with the bio-based polyol. The content of the closed cells in the materials obtained strongly depends on the petrochemical polyol used. The results indicate that the chemical structure of the petrochemical polyol had a significant effect on the cellular structure as well as the physicalmechanical properties of the final products. A significant worsening of the foams' mechanical properties was observed as an effect of a partial replacement of the polyester polyol with the rapeseed oil-based polyol. In contrast, a partial replacement of the polyether polyol caused an improvement of the cell structure keeping the mechanical properties of the modified foams at the same level.

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“…Using the masterbatch, a 300% impact resistance increase compared to virgin PP, without substantially decreasing of stiffness and strength, was obtained due to a synergistically effect between the components 2 ( Figure 4). A set of rigid PUR foams based on recycled resources as a core material for cross-beam and crash boxes (Kirpluks et al, 2016) were developed in a very broad range of densities 50-600 kg/m 3 . The PUR foam formulation was based on aromatic polyester polyols obtained from recycled polyethylene terephthalate.…”

Section: Specific Materials Developed During the Project For The Demomentioning

confidence: 99%

Evolution FP7 funded project: body structure design strategies using new composite and aluminium materials and enabled technologies

Mangino

Alcalde

Maestro

et al. 2017

IJAUTOC

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Based on Pininfarina Nido EV concept, EVolution aims to reduce the vehicle weight through new materials and process technologies, focused on five demonstrators: underbody, front crossbeam, mechanical subframe, shotgun system and door. This paper refers to body structure design strategies using new composite, Al materials and enabled technologies, focusing in particular on demonstrators design and manufacturing. The new front crossbeam geometry of the front shell is adapted starting from the Nanotough design, while the rear shell is specific for EVolution. The subframe demonstrator is redesigned to fulfil mechanical requirements of the part and manufacturing feasibility either. The EVolution door concept consists of two semistructural Evolution FP7 funded project: body structure design strategies 253 composite skins including a structural Al frame. The underbody is conceived through an integrated approach, optimising each element for its function. The shotgun component is designed to link parts obtained with different manufacturing technologies and several aluminium alloys in one single component: the structural node demonstrator.

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Mechanical and Thermal Properties of High-Density Rigid Polyurethane Foams from Renewable Resources

Cited by 36 publications

References 3 publications

Rigid Polyurethane Foams with Various Isocyanate Indices Based on Polyols from Rapeseed Oil and Waste PET

Rigid Polyurethane Foams with Various Isocyanate Indices Based on Polyols from Rapeseed Oil and Waste PET

Influence of Chemical Structure of Petrochemical Polyol on Properties of Bio-polyurethane Foams

Evolution FP7 funded project: body structure design strategies using new composite and aluminium materials and enabled technologies

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