Curing properties of high‐<i>Ortho</i> phenol‐formaldehyde resins with co‐catalysis

Li, Jiongjiong; Zhu, Wenjie; Zhang, Jizhi; Zhang, Shifeng; Gao, Qiang; Li, Jianzhang; Zhang, Wei

doi:10.1002/app.47229

Cited by 14 publications

(11 citation statements)

References 32 publications

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“…The challenges faced when manufacturing a polymer‐matrix composite lie, not only, in the uniform dispersion of the filler but also in the strength of the adhesion between the filler and the matrix 24 . The improvement of the interfacial region enables efficient stress transfer between the two components of the composite.…”

Section: Introductionmentioning

confidence: 99%

Thermal and mechanical properties of epoxy resin reinforced with modified iron oxide nanoparticles

Baghdadi

Youssef

Bouhadir

et al. 2021

J of Applied Polymer Sci

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Epoxy polymers, having good mechanical properties and thermal stability, are often used for engineering applications. Their properties can be further enhanced by the addition of iron oxide (Fe3O4) nanoparticles (NPs) as fillers to the resin. In this study, pristine Fe3O4 NPs were functionalized with polydopamine (PDA), (3‐glycidoxypropyl)trimethoxysilane (GPTMS), and (3‐aminopropyl)trimethoxysilane (APTES). X‐ray diffraction and scanning electron microscopy (SEM) were used to study any changes in the crystal structure and size of the NPs while Fourier‐Transform Infrared Spectroscopy (FTIR) and Thermogravimetric Analysis (TGA) were used to ensure the presence of functional groups on the surface. The mechanical properties of the Fe3O4‐based nanocomposites generally improved except when reinforced with Fe3O4/PDA. The maximum improvement in tensile strength (∼34%) and fracture toughness (∼13%) were observed for pristine Fe3O4‐based nanocomposites. Dynamic mechanical analysis (DMA) showed that the use of any of the treated NPs improved the material's initial storage modulus and had a substantial impact on its dissipation potential. Also, it was observed that the glass transition temperature measurements by DMA and differential scanning calorimetry were below that of pure epoxy. SEM of the cracked surfaces shows that the incorporation of any NPs leads to an enhancement in its thermal and mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Thermal and mechanical properties of epoxy resin reinforced with modified iron oxide nanoparticles

Baghdadi

Youssef

Bouhadir

et al. 2021

J of Applied Polymer Sci

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“…The NH characteristic peak of HBPA was located at 2.36 ppm (peak 4). [ 28 ] The above findings indicated that the HBPA had been successfully synthesized. In the spectrum of HBPA–g–WSSPS, the typical NH signal appeared shifted to 2.65 ppm (peak 2), indicating that the HBPA was grafted onto the WSSPS, thereby providing a hyperbranched polysaccharide.…”

Section: Resultsmentioning

confidence: 92%

A High‐Performance Bio‐Adhesive Using Hyperbranched Aminated Soybean Polysaccharide and Bio‐Based Epoxide

Zhang

Chen

Zhang

et al. 2020

Adv Materials Inter

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Wood adhesives fabricated from biomass can substitute formaldehyde‐based ones, reducing the consumption of fossil resources and eliminating formaldehyde pollution. In this study, a novel and sustainable water‐soluble soybean polysaccharide (WSSPS)‐based adhesive is designed. Specifically, a hyperbranched aminated polysaccharide (HBPA–g–WSSPS), as an adhesive matrix, is synthesized via grafting reaction between oxidized WSSPS and hyperbranched polyamide (HBPA). Triglycidylamine, a bio‐based epoxide cross‐linker, reacted with the HBPA–g–WSSPS to afford a cross‐linked hyperbranched network, providing strong cohesion for the adhesive. Additionally, polyacrylamide imparted an adjustable viscosity to the adhesive. The resultant WSSPS‐based adhesive enhanced the wet shear strength of plywood (1.24 MPa) by 49% compared to the E0‐level industrial‐use melamine‐urea‐formaldehyde (MUF) resin and by 26% compared to the industrial‐use soybean meal/polyamidoamine‐epichlorohydrin (PAE) adhesive. In addition, the adhesive has characteristics similar to those of the MUF resin, including viscosity, coating performance, hot‐pressing conditions, and dry bond strength, which are superior to those of the soybean meal/PAE adhesive. This developed polysaccharide‐based adhesive can potentially enhance various composites and can be used in industrial sectors.

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“…[ 23–25 ] Over the past few years, tremendous approaches have been proposed for increasing the dispersibility and interfacial interaction in polymer matrix through functionalizing GO. [ 26–31 ] Sahu and his coworkers [ 26 ] used poly (allyl amine) to functionalize GO (GO‐ g ‐PAA), and with the addition of 0.7 wt% GO‐ g ‐PAA, the critical stress intensity factor (K IC ) and bending strength of epoxy composite were increased by 87 and 43%, respectively. Wan et al [ 31 ] achieved modified GO with 3‐glycidoxypropyltrimethoxysilane (silane‐f‐GO), which improved the interfacial and mechanical properties of epoxy composites.…”

Section: Introductionmentioning

confidence: 99%

High‐performance epoxy nanocomposites via constructing rigid structured interphase with epoxy‐rich graphene oxide

Zhang

Heng

Shen

et al. 2020

J of Applied Polymer Sci

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Epoxy resins, as the most important thermosetting matrix of carbon fiber reinforced polymer (CFRP) composites, are widely used in the structural field, but the highly intrinsic brittleness of epoxy resins greatly limits their application. Therefore, it is urgent to develop new method to prepare high‐performance epoxy composites. In this research, GO riched with rigid short‐chain structure epoxy group on its surface was synthesized by chemically grafting dopamine, hexachlorocyclotriphosphazene and glycidol successively. Then the modified nanofillers were incorporated into the epoxy matrix to prepare high‐performance nanocomposites. The effect of epoxy‐rich GO nanosheets as fillers on mechanical properties of aerospace grade epoxy was studied. The results revealed that the epoxy‐rich GO could effectively optimize the performance of epoxy resins owing to forming the rigid structured interphase. The tensile strength and elongation at break of the nanocomposites were up to 113 MPa and 7.6% with 0.075 wt% additives, respectively, which greatly surpassed the value reported by the limited researches on strengthening epoxy with GO and its derivate nanofillers. Therefore, instructive idea and effective method were provided to obtain high‐performance polymer nanocomposite matrix in this study.

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Curing properties of high‐Ortho phenol‐formaldehyde resins with co‐catalysis

Cited by 14 publications

References 32 publications

Thermal and mechanical properties of epoxy resin reinforced with modified iron oxide nanoparticles

Thermal and mechanical properties of epoxy resin reinforced with modified iron oxide nanoparticles

A High‐Performance Bio‐Adhesive Using Hyperbranched Aminated Soybean Polysaccharide and Bio‐Based Epoxide

High‐performance epoxy nanocomposites via constructing rigid structured interphase with epoxy‐rich graphene oxide

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