Mechanical and thermal properties of cationic ring-opening o-cresol formaldehyde epoxy/polyurethane acrylate composites enhanced by reducing graphene oxide

Han, Hongzhe; Jiang, Chunyan; Huo, Li; Gao, Jungang

doi:10.1007/s00289-016-1605-7

Cited by 7 publications

(4 citation statements)

References 44 publications

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“…Figure shows that the bending strength, bending modulus, tensile strength, and tensile modulus are up to 724 MPa, 28.6 GPa, 473 MPa, and 25.6 GPa, respectively, demonstrating PUA‐3 resin‐based composite has the high strength and high modulus. The tensile strength of the as‐obtained glass fiber reinforced composite is more than twice that of composites prepared by Han et al ., which will broaden its application in some areas with high strength requirement. Cross‐sectional SEM photographs of the glass fiber reinforced PUA resin matrix composite in Figure reveal that a large number of resins are covered by the fiber surface (denoted by blue rectangle) and filled in the gaps of neighboring fibers (denoted by red oval), suggesting that PUA resin has a good permeability to the glass fiber gingham cloth.…”

Section: Resultsmentioning

confidence: 90%

UV‐curable polyurethane acrylate resin containing multiple active terminal groups for enhanced mechanical properties

Duan

Dong

Wang

et al. 2019

J of Applied Polymer Sci

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In this article, aiming to develop the high performance ultraviolet (UV)-curable resin used in the polymer matrix composite, a series of polyurethane acrylate (PUA) resins with the different numbers of allyl terminal groups were elaborately designed and synthesized, in which the contents of hard segments and soft segments were also adjusted simultaneously. The effects of allyl number on properties of PUA were systemically investigated. It was found that allyl number had the negligible effect on the processability as well as positive effect on thermal performances, and all PUA resins exhibited the low viscosity and rapid UV polymerization. Besides, with the change of allyl number in the range of 2-4, PUA resin casting with three allyls possessed the preferable mechanical properties such as 85.1 MPa tensile strength, 3.94 GPa tensile modulus, and 20.7 kJ m −2 impact strength. More importantly, the high strength and high modulus of the composite further demonstrated the wide potentials of the as-prepared PUA resin as the ideal resin matrix candidate for the fiber reinforced polymer composites.

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Section: Resultsmentioning

confidence: 90%

UV‐curable polyurethane acrylate resin containing multiple active terminal groups for enhanced mechanical properties

Duan

Dong

Wang

et al. 2019

J of Applied Polymer Sci

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“…This can be attributed to the structural differences of the LCFs: LCF-0 formed disordered carbon when subjected to thermal treatment, whereas LCF-5 was the most catalyzed and generated the highest amount of graphitic carbon in the amorphous carbon phase. The amorphous carbon region was relatively thermally unstable and easily decomposed during carbonization compared with the graphite region (Akhtar et al, 2016;Han et al, 2016). Thus, the surface area and roughness increased as the Ni(acac) 2 content increased.…”

Section: Structural Determinationmentioning

confidence: 99%

Graphitized lignin-based activated carbon fibers and their application in supercapacitors

You

Wang

Zhou

et al. 2022

Preprint

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As an abundant bioresource of carbon, lignin has the potential to form carbon fibers (CFs), which can then be used as electrode materials in supercapacitors. However, most studies have only focused on the morphology of CFs, such as the specific surface area and pore-size distribution, while ignoring the influence of the carbon structure in CFs. In this study, Ni(acac)2 was used as a graphitization catalyst in CFs preparation and to further modify the morphology of the fibers. Meanwhile, the addition of Ni(acac)2 remarkably shortened the thermostabilization period from 76 h to 2.25 h, which significantly reduced the energy consumption. The resulting lignin-based activated carbon fibers (LACFs) with graphitized structures presented a controllable pore-size distribution and large surface areas up to 582.7 m2 g− 1. These LACFs were then used as electrode materials in supercapacitors, and the assembled devices displayed high energy and power densities of up to 22.1 Wh kg− 1 and 239 kW kg− 1, respectively, using organic electrolytes.

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“…Many studies have been also devoted to nanocomposites with graphite nanofillers in different kinds of phenolic resins [33,34,35,36,37,38,39,40,41]. One of these studies [39] has clearly shown that reduced graphene oxide (r-GO) can enhance mechanical properties and thermal stability of composites. Moreover, a study on benzoxazine-based composites has shown that addition of a few weight percent of graphene oxide accelerates the ring opening reactions leading to not only a decrease in cure temperature, but also to improvements of thermal stability [42].…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide and Oxidized Carbon Black as Catalyst for Crosslinking of Phenolic Resins

et al. 2019

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Influence of different graphite-based nanofillers on crosslinking reaction of resorcinol, as induced by hexa(methoxymethyl)melamine, is studied. Curing reactions leading from low molecular mass compounds to crosslinked insoluble networks are studied by indirect methods based on Differential Scanning Calorimetry. Reported results show a catalytic activity of graphene oxide (eGO) on this reaction, comparable to that one already described in the literature for curing of benzoxazine. For instance, for an eGO content of 2 wt %, the exothermic crosslinking DSC peak (upon heating at 10 °C/min) shifted 6 °C. More relevantly, oxidized carbon black (oCB) is much more effective as catalyst of the considered curing reaction. In fact, for an oCB content of 2 wt %, the crosslinking DSC peak can be shifted more than 30 °C and a nearly complete crosslinking is already achieved by thermal treatment at 120 °C. The possible origin of the higher catalytic activity of oCB with respect to eGO is discussed.

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Mechanical and thermal properties of cationic ring-opening o-cresol formaldehyde epoxy/polyurethane acrylate composites enhanced by reducing graphene oxide

Cited by 7 publications

References 44 publications

UV‐curable polyurethane acrylate resin containing multiple active terminal groups for enhanced mechanical properties

UV‐curable polyurethane acrylate resin containing multiple active terminal groups for enhanced mechanical properties

Graphitized lignin-based activated carbon fibers and their application in supercapacitors

Graphene Oxide and Oxidized Carbon Black as Catalyst for Crosslinking of Phenolic Resins

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