A review on the production, properties and applications of non-isocyanate polyurethane: A greener perspective

Khatoon, Halima; Iqbal, Sajid; Irfan, Mohd; Darda, Abu; Rawat, Neha

doi:10.1016/j.porgcoat.2020.106124

Cited by 110 publications

(89 citation statements)

References 47 publications

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“…Polystyrene is derived from petroleum, which makes its production environmentally damaging. Polyurethanes are synthesized from isocyanates, which are highly toxic for the environment and hazardous for health [ 4 ]. Moreover, glass wool and fiberglass are reported to cause respirational health concerns [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Alkaline Treatment on Poly(lactic acid)/Date Palm Wood Green Composites for Thermal Insulation

2022

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In this work, the effect of alkaline treatment on the thermal insulation and mechanical properties of date palm wood fibers (DPWF) and polylactic acid (PLA) green composite was studied. Alkaline treatment was applied to DPWF using two different solutions: sodium hydroxide (NaOH) and potassium hydroxide (KOH), with concentration of 2 vol.%. The fibers were later incorporated into PLA with weight percentages from 10 to 40 wt.%, to form three composite types: PLA with untreated fibers (PLA-UTDPWF), PLA with KOH treated fibers (PLA-KOH), and PLA with NaOH treated fibers (PLA-NaOH). The prepared composites were for use as a green thermal insulation material. The composites were tested to assess the effect of treatment on their physical (density and degree of crystallization), thermal (thermal conductivity, specific heat capacity, thermal diffusivity, thermal degradation, glass transition, and melting temperature), and mechanical properties. Moreover, the composite structural characteristics were investigated using FTIR and SEM analysis. The alkaline treatment significantly increased the crystallinity of the composites, specifically for higher filler loadings of 30 and 40 wt.%. The crystallinity for the 40 wt.% increased from 33.2% for PLA-UTDPWF, to 41% and 51%, for PLA-NaOH and PLA-KOH, respectively. Moreover, the alkaline treatment reduced the density and produced lighter composites than the untreated specimens. For instance, the density of 40 wt.% composite was reduced from 1.43, to 1.22 and 1.30 gcm3 for PLA-NaOH and PLA-KOH, respectively.

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Section: Introductionmentioning

confidence: 99%

The Effect of Alkaline Treatment on Poly(lactic acid)/Date Palm Wood Green Composites for Thermal Insulation

2022

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“…Therefore, there is a drive to not only limit the use of isocyanates but also substitute fossil resources with renewable ones in order to move toward a more sustainable industry. 10 …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, there is a drive to not only limit the use of isocyanates but also substitute fossil resources with renewable ones in order to move toward a more sustainable industry. 10 Various routes have been developed to synthesize NIPUs from a diverse range building blocks such as (i) the ring-opening polymerization of carbamates, (ii) the copolymerization of aziridines with CO 2 , (iii) the polycondensation of bis(dialkylcarbonate)s with diamines or bis(dialkylcarbamate)s with diols, and (iv) the polyaddition of poly(cyclic carbonate)s to polyamines. Of these, the latter pathway is by far the most popular and competitive approach.…”

Section: ■ Introductionmentioning

confidence: 99%

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Poly(hydroxyurethane) Adhesives and Coatings: State-of-the-Art and Future Directions

Gomez-Lopez

Panchireddy

Grignard

et al. 2021

ACS Sustainable Chem. Eng.

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Polyurethane (PU) adhesives and coatings are widely used to fabricate high-quality materials due to their excellent properties and their versatile nature, which stems from the wide range of commercially available polyisocyanate and polyol precursors. This polymer family has traditionally been used in a wide range of adhesive applications including the bonding of footwear soles, bonding of wood (flooring) to concrete (subflooring), in the automotive industry for adhering different car parts, and in rotor blades, in which large surfaces are required to be adhered. Moreover, PUs are also frequently applied as coatings/paints for automotive finishes and can be applied over a wide range of substrates such as wood, metal, plastic, and textiles. One of the major drawbacks of this polymer family lies in the use of toxic isocyanate-based starting materials. In the context of the REACH regulation, which places restrictions on the use of substances containing free isocyanates, it is now urgent to find greener routes to PUs. While non-isocyanate polyurethanes (NIPUs) based on the polyaddition of poly(cyclic carbonate)s to polyamines have emerged in the past decade as greener alternatives to conventional PUs, their industrial implementation is at an early stage of development. In this review article, recent advances in the application of NIPUs in the field of adhesives and coatings are summarized. The article also draws attention to the opportunities and challenges of implementing NIPUs at the industrial scale.

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“…Os poliuretanos são provavelmente a classe de polímeros mais versátil devido a sua grande variedade de matérias-primas que podem ser utilizadas em sua obtenção [1]. Os pré-polímeros funcionalizados à base de polibutadieno são usados em propelente sólido compósito como combustível e percursor do binder de poliuretano.…”

Section: Introductionunclassified

Obtenção e caracterização de propelentes sólidos compósitos à base de PBLH, alumínio e perclorato de amônio com binders modificados com dióis de cadeia curta

Cunha¹,

Rocco²

2021

Matéria (Rio J.)

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RESUMO O presente estudo avaliou diferentes formulações de propelentes sólidos à base de PBLH/AP/Al modificados por dióis de cadeia curta, 1,4-butanodiol e 1,2-propanodiol, em diferentes concentrações mássicas, com intuito de obter propriedades mecânicas diferenciadas sem negligenciar os demais requisitos impostos, tais como processabilidade e propriedades balísticas, destas mesmas formulações. Neste sentido, desenvolveu-se uma metodologia de cálculo das formulações, onde o processamento das mesmas foi realizado em reator de pequeno porte. Com a intenção de avaliar a influência do teor mássico de plastificante empregado, também foi processada uma formulação, de maior teor de 1,4-butanodiol, com maior quantidade de plastificante. Para tanto, avaliou-se o perfil de viscosidade dinâmica pós-processamentos, a evolução da propriedade mecânica da dureza durante a cura e realizaram-se ensaios mecânicos de tração e dureza finais. Realizaram-se também ensaios de determinação de massa específica, Raio-X das amostras e bomba calorimétrica. Ficou evidente que formulações modificadas com 1,4-butanodiol são promissoras. Não obstante, não foi possível alcançar no presente estudo todos os requisitos esperados em um produto final para emprego imediato.

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A review on the production, properties and applications of non-isocyanate polyurethane: A greener perspective

Cited by 110 publications

References 47 publications

The Effect of Alkaline Treatment on Poly(lactic acid)/Date Palm Wood Green Composites for Thermal Insulation

The Effect of Alkaline Treatment on Poly(lactic acid)/Date Palm Wood Green Composites for Thermal Insulation

Poly(hydroxyurethane) Adhesives and Coatings: State-of-the-Art and Future Directions

Obtenção e caracterização de propelentes sólidos compósitos à base de PBLH, alumínio e perclorato de amônio com binders modificados com dióis de cadeia curta

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