Curing kinetics of a furan resin and its nanocomposites

Rivero, Guadalupe; Pettarín, Valeria; Vázquez, Analı́a; Manfredi, Liliana Beatriz

doi:10.1016/j.tca.2011.01.022

Cited by 54 publications

(31 citation statements)

References 29 publications

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“…Furan resins have particular advantages in that they are derived from bio-sources and are based on furfuryl alcohol, which is less toxic than the formaldehyde used for synthesis of PH resins. Hence, furans have the potential to replace phenolic resins for applications where the fire performance criterion of composites is high [14]. Most of the furan resins are either unmodified furfuryl alcohol polymers or aldehyde modified furfuryl alcohol polymers, and are cured using an acid catalyst [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Hence, furans have the potential to replace phenolic resins for applications where the fire performance criterion of composites is high [14]. Most of the furan resins are either unmodified furfuryl alcohol polymers or aldehyde modified furfuryl alcohol polymers, and are cured using an acid catalyst [14,15]. Phenolic and furan resins have some commonalities in that both cross-link by polycondensation with the elimination of water [8,16].…”

Section: Introductionmentioning

confidence: 99%

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Flame Retardance and Physical Properties of Novel Cured Blends of Unsaturated Polyester and Furan Resins

2015

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Novel blends of two furan resins with an unsaturated polyester have been prepared and cured by parallel free radical (for the unsaturated polyester) and acid-catalysed crosslinking (for the furan resin) to give co-cured composite materials. Although these materials have inferior physical properties, such as low Tg and low storage modulus compared with those of unsaturated polyester and furan resins alone, they show markedly improved flame retardance compared with that of the normally highly flammable unsaturated polyester. This increased flame retardance arises from a condensed phase mechanism in which the furanic component forms a semi-protective char, reducing rates of thermal degradation and total heat release and heat of combustion. The blends also burn with reduced smoke output compared with that from unsaturated polyester alone.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flame Retardance and Physical Properties of Novel Cured Blends of Unsaturated Polyester and Furan Resins

2015

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“…This method has previously shown excellent agreement with measured data and was found to be superior compared to other studied isoconversion methods [25,27,28].…”

Section: Isoconversionmentioning

confidence: 66%

Fast-curing epoxy polymers with silica nanoparticles: properties and rheo-kinetic modelling

et al. 2015

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Fast-curing epoxy polymers allow thermoset parts to be manufactured in minutes, but the curing reaction is highly exothermic with heat flows up to 20 times higher than conventional epoxies. The low thermal conductivity of the polymer causes the mechanical and kinetic properties of parts to vary through their thickness. In the present work, silica nanoparticles were used to reduce the exotherm, and hence improve the consistency of the parts. The mechanical and kinetic properties were measured as a function of part thickness. The exothermic heat of reaction was significantly reduced with the addition of silica nanoparticles, which were well dispersed in the epoxy. The silica nanoparticles increased the Young's modulus linearly from 3.6 to 4.6 GPa with 20 wt% of silica, but the fracture energy was found to increase less than for many slow-curing epoxy resins, with values of 176-211 J m -2 being measured. Although there was no additional toughening, shear band yielding was observed. Further, the addition of silica nanoparticles increased the molecular weight between crosslinks, indicating the relevance of detailed cure kinetics when studying fast-curing epoxy resins. A model was developed to describe the increase in viscosity and degree of cure of the unmodified and the silica-modified epoxies. A heat transfer equation was used to predict the temperature and resulting properties through the thickness of a plate, as well as the effect of the addition of silica nanoparticles. The predictions were compared to the experimental data, and the agreement was found to be very good.

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“…Apesar do furfural ser um derivado do tratamento ácido dos hidratos de carbono de material vegetal de resíduos, a cola de furano é considerada atualmente como uma cola puramente sintética [62], podendo ser, no entanto, comparável às colas naturais. Deste modo, as colas de furano podem ser consideradas uma boa alternativa às colas fenólicas, possibilitando ter um material com uma excelente resistência térmica e oxidativa, tal como as colas fenólicas proporcionam, mas com uma significativa redução das emissões de formaldeído [63].…”

Section: Hidratos De Carbonounclassified

Utilização de colas naturais para placas de derivados de madeira – uma síntese

Cardoso

Nunes

Faria

2015

Ciência & Tecnologia dos Materiais

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ResumoNos últimos anos tem-se verificado um interesse crescente pela área das colas naturais, em particular na produção de placas de derivados de madeira para utilização no interior das construções. Estas colas parecem ser uma boa alternativa às colas sintéticas, derivadas do petróleo, pois, ao contribuírem para uma melhor qualidade do ar interior associada a uma menor incorporação de energia no produto final, apresentam vantagens interessantes em termos ambientais e de saúde. Nesse sentido fez-se uma revisão da bibliografia sobre a utilização laboratorial e mesmo semi-industrial de colas naturais em placas de derivados de madeira. São apresentados e discutidos alguns exemplos de materiais que estas colas aglutinam, bem como as suas características finais com vista a futuros desenvolvimentos experimentais de placas fabricadas a partir de resíduos agrícolas comuns. © 2015 Sociedade Portuguesa de Materiais (SPM). Publicado por Elsevier España, S.L. Todos os direitos reservados.Palavras chave: cola natural; derivado de madeira, resíduo agrícola; ambiente interior AbstractAn increased interest for bio-based adhesives for wood-based panels for building purposes has been arising. This type of adhesives could be a good alternative for petroleum based synthetic adhesives as bio-based adhesives can contribute for healthier indoor environments and, simultaneously, present lower embodied energy. For the previous reasons a bibliographic review was conducted, on the use of bio-based adhesives for the production of wood-based building panels. Some examples of the adhesives, the type of applications and the characterization of the resulting products are presented and compared, bearing in mind contributing for a future increase of research in this area.

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Curing kinetics of a furan resin and its nanocomposites

Cited by 54 publications

References 29 publications

Flame Retardance and Physical Properties of Novel Cured Blends of Unsaturated Polyester and Furan Resins

Flame Retardance and Physical Properties of Novel Cured Blends of Unsaturated Polyester and Furan Resins

Fast-curing epoxy polymers with silica nanoparticles: properties and rheo-kinetic modelling

Utilização de colas naturais para placas de derivados de madeira – uma síntese

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