Polyurethane rigid foams obtained from polyols containing bio-based and recycled components and functional additives

Gaidukova, Gerda; Ivdre, Aiga; Fridrihsone, Anda; Verovkins, Anrijs; Cābulis, Uģis; Gaidukovs, Sergejs

doi:10.1016/j.indcrop.2017.03.024

Cited by 50 publications

(29 citation statements)

References 48 publications

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“…The highest density with an average of 45 kg/m 3 was observed for Ar-2-Foams, while the lowest density with an average of 35 kg/m 3 was observed for Ali-2-Foams. 29 This suggests that both aliphatic and aromatic structured foams in this study showed higher closed cell content with an almost similar range of density. 2 Close cell content is one of the important properties of rigid PU foam.…”

Section: Resultsmentioning

confidence: 51%

“…The apparent density and closed cell content were observed to be in the range 42.6-52.5 kg/m 3 and 89.9-98.2% for rigid foams. 29 This suggests that both aliphatic and aromatic structured foams in this study showed higher closed cell content with an almost similar range of density. Moreover, maintaining density range between industrial standards enables its application in industrial foams.…”

Section: Resultsmentioning

confidence: 51%

“…It can be observed that with increasing bromine content by adding more Br-polyols increases the density of the PU foams. Gaidukova et al 29 synthesized rigid foams from bio-based and recycled components. However, overall observations suggest that all foams maintained their standard density for industrial foams.…”

Section: Resultsmentioning

confidence: 99%

“…Feng and Qian 28 synthesized polyether polyol to obtain density and closed cell content in the range 36-46.3 kg/m 3 and 85.4-87.5%. Gaidukova et al 29 synthesized rigid foams from bio-based and recycled components. The apparent density and closed cell content were observed to be in the range 42.6-52.5 kg/m 3 and 89.9-98.2% for rigid foams.…”

Section: Resultsmentioning

confidence: 99%

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Highly flame‐retardant bio‐based polyurethanes using novel reactive polyols

Bhoyate

Ionescu

Radojčić

et al. 2017

J of Applied Polymer Sci

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Poor flame retardancy of polyurethanes (PU) is a global issue as it limits their applications particularly in construction, automobile, and household appliances industries. The global challenge of high flammability of PU can be addressed by incorporating flame-retardant materials. However, additive flame-retardants are non-compatible and depreciate the properties of PU. Hence, reactive flame-retardants (RFR) based on aliphatic (Ali-1 and Ali-2) and aromatic (Ar-1 and Ar-2) structured bromine compounds were synthesized and used to prepare bio-based PU using limonene dimercaptan. The aromatic bromine containing foams showed higher close cell content (average 97 and 100%) and compressive strength (230 and 325 kPa) to that of aliphatic bromine containing foams. Similar behavior was observed for a horizontal burning test where with a low concentration of bromine (5 wt %) in the foams for Ar-1 and Ar-2 displayed a burning time of 12.5 and 11.8 s while, Ali-1 and Ali-2 displayed burning time of 25.7 and 37 s, respectively. Neat foam showed a burning time of 74 s. The percentage weight loss for neat PU foam was 26.5%, while foams containing 5 wt % bromine in Ali-1, Ali-2, Ar-1, and Ar-2 foams displayed weight loss of 11.3, 14, 7.9, and 14%, respectively. Our results suggest that flame retardant PU foams could be prepared effectively by using RFR materials.

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Section: Resultsmentioning

confidence: 51%

Section: Resultsmentioning

confidence: 51%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Highly flame‐retardant bio‐based polyurethanes using novel reactive polyols

Bhoyate

Ionescu

Radojčić

et al. 2017

J of Applied Polymer Sci

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“…In addition, aminolysis or ammonolysis of the polymer affords valuable monomers which are relevant for production of polyurethane [5,6]. However, the feasibility of the chemolytic depolymerization of PET waste is quite low at the moment due to the harsh reaction conditions required for the polymer scission as well as due the contamination of the products with metal salts from the used catalysts [7][8][9]. Organic catalysts were reported as attractive alternatives to traditional organometallic salts due to low working temperature and selective polymerization/depolymerization reactions [10][11][12][13][14][15][16].…”

mentioning

confidence: 99%

Functionalized 1,5,7-triazabicyclo [4.4.0] dec-5-ene (TBD) as Novel Organocatalyst for Efficient Depolymerization of Polyethylene Terephthalate (PET) Wastes

Nica¹,

Duldner²,

Hanganu³

et al. 2018

Rev. Chim.

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Poly(ethyleneterephthalate) waste was efficiently depolymerized through glycolysis and aminolysis reactions in the presence of functionalized 1,5,7-triazabicyclo [4.4.0] dec-5-ene (TBD) catalyst. The new catalyst of monoamide-ester type, was synthesized through reaction of dimethylterephthalate (DMT) with TBD in refluxing benzene. It was developed as a consequence of the mechanistic investigations of the transesterification reaction of isosorbide with DMT. To test the stability of functionalized TBD compound towards possible amide bond breakage, reactions with primary and secondary glycols as well as primary amines were performed when only the carboxymethyl group reacted. Moreover, it was found that the depolymerization of poly(ethyleneterephthalate) wastes proceeds faster in the presence of this novel organocatalyst by comparison with the hygroscopic TBD precursor.

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Cemental composites with polyurethane and recycled polyvinyl chloride: The influence of industrial waste addition on flammability

et al. 2021

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In the construction industry, the large number of residues presents a challenge for recycling and the possibility of producing new materials. This study reported the effects of the addition of polyvinyl chloride (PVC) residues and cement/alumina trihydrate on the production of a fire-resistant thermalacoustic insulation material. The composites were verified by scanning electron microscopy, the polyurethane (PU) cells were maintained with the addition of PVC, cement, and trihydrate alumina. The reduction in compressive strength for boards with 50% PVC waste as a replacement for the PU raw material. The boards showed the composites' conductivity coefficient was lower than that of the perforated brick and combustion deceleration up to flame extinction in the flammability test (UL94) because of the PVC/cement/ alumina trihydrate. They also presented cost savings (~57%) and carbon dioxide emissions (~49%) from the raw material, contributing to developing a less predatory and socio-environmentally responsible industry.

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Polyurethane rigid foams obtained from polyols containing bio-based and recycled components and functional additives

Cited by 50 publications

References 48 publications

Highly flame‐retardant bio‐based polyurethanes using novel reactive polyols

Highly flame‐retardant bio‐based polyurethanes using novel reactive polyols

Functionalized 1,5,7-triazabicyclo [4.4.0] dec-5-ene (TBD) as Novel Organocatalyst for Efficient Depolymerization of Polyethylene Terephthalate (PET) Wastes

Cemental composites with polyurethane and recycled polyvinyl chloride: The influence of industrial waste addition on flammability

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