A brief discussion on advances in polyurethane applications

Das, Abhijit; Mahanwar, Prakash A.

doi:10.1016/j.aiepr.2020.07.002

Cited by 270 publications

(255 citation statements)

References 55 publications

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“…Polyurethanes (PU), whether one-part or two-part, are high-performance and very versatile and have a wide range of properties, including adhering to a varied range of substrates. Generally, the T g of polyurethanes is higher than that of silicones, but lower than that of highly cross-linked, structural epoxy resin adhesives [6,7]. The outstanding features of polyurethanes are good mechanical properties at low temperatures (i.e., high elongation capacity, high energy absorption capacity, high resistance in aggressive environments, thermal stability and chemical resistance) [8].…”

Section: Polyurethane Adhesivesmentioning

confidence: 99%

A Review of Structural Adhesive Joints in Hybrid Joining Processes

et al. 2021

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Hybrid joining (HJ) is the combination of two or more joining techniques to produce joints with enhanced properties in comparison to those obtained from their parent techniques. Their adoption is widespread (metal to metal joint, composite to composite and composite to metal) and is present in a vast range of applications including all industrial sectors, from automotive to aerospace, including naval, construction, mechanical and utilities. The objective of this literature review is to summarize the existing research on hybrid joining processes incorporating structural adhesives highlighting their field of application and to present the recent development in this field. To achieve this goal, the first part presents an introduction on the main class of adhesives, subdivided by their chemical nature (epoxy, polyurethane, acrylic and cyanoacrylate, anaerobic and high-temperature adhesives) The second part describes the most commonly used Hybrid Joining (HJ) techniques (mechanical fastening and adhesive bonding, welding processes and adhesive bonding) The third part of the review is about the application of adhesives in dependence of performance, advantage and disadvantage in the hybrid joining processes. Finally, conclusions and an outlook on critical challenges, future perspectives and research activities are summarized. It was concluded that the use of hybrid joining technology could be considered as a potential solution in various industries, in order to reduce the mass as well as the manufacturing cost.

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Section: Polyurethane Adhesivesmentioning

confidence: 99%

A Review of Structural Adhesive Joints in Hybrid Joining Processes

et al. 2021

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“…A base industrial para os poliuretanos que evoluiu nos últimos 50 anos foi impulsionada basicamente por dois fatores, o primeiro sendo a economia da produção da matéria-prima e o segundo a diversidade do mercado de plásticos duros e tintas adesivas. Atualmente, os PU's detêm uma das maiores participações de mercado na indústria de plásticos e CASE (revestimentos, adesivos, selantes e elastômeros), e, por suas propriedades superiores, assumiram vários tipos de aplicações, inclusive aplicações biomédicas (Das & Mahanwar, 2020). Pode-se associar o vultuoso ganho na produção de PU's ao crescente avanço nos estudos sobre as aplicações do material.…”

Section: Palavras-chaveunclassified

Monitoramento de artigos sobre a utilização de nanocompósitos com matriz de poliuretano aplicados à engenharia de tecidos para o reparo ósseo

Silva

Trindade

Filho

et al. 2021

RSD

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Nanocompósitos com matriz de poliuretano são materiais com propriedades interessantes para a Engenharia de tecidos, podendo ser usados na fabricação de arcabouço para regeneração óssea. O objetivo dessa pesquisa foi avaliar a evolução das publicações cientificas relacionadas a nanocompósitos com matriz de poliuretano aplicados à regeneração do tecido ósseo. Realizou-se buscas nas bases de periódicos Web of Science e Scopus, fazendo uso de uma combinação de palavras-chave, e os resultados reportados foram tabulados e analisados. Verificou-se que os primeiros documentos datam de 2009. A China detém o maior número de publicações, seguido pela Malásia e Vietnã. As principais áreas de pesquisa são Engenharia, Ciência dos materiais e Engenharia química. Percebeu-se uma valorização crescente da temática, com aumento na produção e impacto dessas publicações. Pode-se considerar que a questão levantada possui grande relevância por ser um campo de estudos promissor que promete trazer importantes avanços à engenharia de tecidos ósseos.

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“…Polyurethanes (PU) are important polymeric materials which have been widely used in development of different applications such as biomedical, [11][12][13] construction, 14 textiles, 15 automotive, 16 marine, 17 and in several other industries. 18,19 PU are synthetized by polyaddition reaction of different soft segments (polyesters, polyethers, polycarbonates) and hard segments (isocyanate and various chain extenders).…”

Section: Introductionmentioning

confidence: 99%

Surface energy evaluation of casting and nanofiber polyurethane films by using different models

Grădinaru¹,

Barbălată-Mândru²,

Vlad³

et al. 2021

J of Applied Polymer Sci

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The components of the surface free energy (SFE) were determined from static contact angle measurements of five liquids using different methods. The two manufacturing techniques (casting and electrospinning) applied to obtain polyurethane (PU) membranes give surfaces with different wetting properties.The SFE data varied and were strongly dependent on calculations methods and liquids that were used for contact angle measurements. As a whole, the SFE of electrospun PU membrane (PU-N) (~24 mN/m) was slightly higher than that of casting PU membrane (PU-F) (~18 mN/m) with similar chemical compositions. The overall increase in the value of SFE is mainly due to the microstructures with increased surface area and modulations of nanofibers. The results evidence the impact of the PU membrane preparation on the properties of the biomaterial surface. Such structure-properties-function relationship is necessary to lay the groundwork for establishing a set of design criteria to guide the fabrication of synthetic materials.

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A brief discussion on advances in polyurethane applications

Cited by 270 publications

References 55 publications

A Review of Structural Adhesive Joints in Hybrid Joining Processes

A Review of Structural Adhesive Joints in Hybrid Joining Processes

Monitoramento de artigos sobre a utilização de nanocompósitos com matriz de poliuretano aplicados à engenharia de tecidos para o reparo ósseo

Surface energy evaluation of casting and nanofiber polyurethane films by using different models

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