Enhanced mechanical and thermal properties of monocomponent high performance epoxy resin by blending with hydroxyl terminated polyethersulfone

Jiang, Minqiang; Liu, Yong; Cheng, Chao; Zhou, Jinli; Liu, Baihua; Yu, Miao; Zhang, Hui

doi:10.1016/j.polymertesting.2018.05.039

Cited by 61 publications

(36 citation statements)

References 35 publications

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“…However, the addition of PSF meanwhile augmented the viscosity of the blended resin, particularly when the PSF content exceeded 15 phr. The matrix of 20 phr PSF corresponding to a phase inversion structure led to lower flexural properties, impact strength and toughness compared to those of the sample containing 15 phr PSF, which might be due to the epoxy resin in the phase inverted structure being discontinuous and lacking a continuous crosslinked network [39].…”

Section: Resultsmentioning

confidence: 99%

Enhancing the Mechanical and Thermal Properties of Epoxy Resin via Blending with Thermoplastic Polysulfone

Sun

Chen

et al. 2019

Polymers

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Efficient enhancement of the toughness of epoxy resins has been a bottleneck for expanding their suitability for advanced applications. Here, polysulfone (PSF) was adopted to toughen and modify the epoxy. The influences of PSF on the mechanical and thermal properties of the epoxy resin were systematically studied by optical microscopy, Fourier transform infrared spectrometer (FT-IR), differential scanning calorimetry (DSC), thermogravimetric analyzer (TG), dynamic mechanical thermal analyzer (DMA), mechanical tests and scanning electron microscope (SEM). The dissolution experimental results showed that PSF presents a good compatibility with the epoxy resin and could be well dissolved under controlled conditions. The introduction of PSF was found to promote the curing reaction of the epoxy resin without participating in the curing reaction and changing the curing mechanism as revealed by the FT-IR and DSC studies. The mechanical properties of PSF/epoxy resin blends showed that the fracture toughness and impact strength were significantly improved, which could be attributed to the bicontinuous phase structure of PSF/epoxy blends. Representative phase structures resulted from the reaction induced phase separation process were clearly observed in the PSF/epoxy blends during the curing process of epoxy resin, which presented dispersed particles, bicontinuous and phase inverted structures with the increase of the PSF content. Our work further confirmed that the thermal stability of the PSF/epoxy blends was slightly increased compared to that of the pure epoxy resin, mainly due to the good heat resistance of the PSF component.

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Section: Resultsmentioning

confidence: 99%

Enhancing the Mechanical and Thermal Properties of Epoxy Resin via Blending with Thermoplastic Polysulfone

Sun

Chen

et al. 2019

Polymers

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“…For polymer blends, it was shown in the literature that a significant improvement of the impact resistance is obtained when tougheners have phase separated to form morphology at the submicron scale [3, 4]. Specifically in polyethersulfone/epoxy blends, better fracture toughness was observed for systems presenting bicontinuous morphology [5, 6].…”

Section: Introductionmentioning

confidence: 99%

Thermoset modified with polyethersulfone: Characterization and control of the morphology

Mathis

Michon

Billaud

et al. 2020

Journal of Polymer Science

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Thermoset (TS) epoxy resins can be toughened with a thermoplastic (TP) for high-performance applications. The final structure morphology has to be controlled to achieve high mechanical properties and high impact resistance. Four polyethersulfone-modified epoxy resins are considered. They consist of different epoxy monomer structure (TGAP, triglycidyl-p-aminophenol and TGDDM, tetraglycidyl diaminodiphenylmethane) and a fixed amount of thermoplastic, and they are cured with two different amounts of curing agent. A reactioninduced phase separation occurs for all formulations generating morphologies, different in shapes and scales. The aim is to control the final morphology and in particular its dominant length scale. This morphology depends on the phase separation process, from the initiation to its final stage. The initiation relies on the relative miscibility of the components and on the stoichiometry between epoxy and curing agent. The kinetics depends on the viscosity of the systems. The different morphologies are characterized by electron microscopy or neutron scattering. Dynamic mechanical analysis allows confirming the presence of a phase separation even when it is not observable by electron microscopy.Vermicular morphologies with few hundreds nanometer width are obtained for the systems containing the TGAP as epoxy monomer. Systems formulated with TGDDM presents morphologies on much smaller scale of order a few tens of nanometers. We interpret the different sizes of the morphologies as a consequence of a larger viscosity for the TGDDM systems as compared to the TGAP ones rather than by a latter initiation of phase separation. K E Y W O R D S epoxy resins, morphology, polymer blends, toughening

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“…(17) Epoxy resin has outstanding mechanical properties, thermal stability, chemical resistance, adhesion properties, and dimensional stability arising from the highly crosslinked structures of the cured epoxy resin. (18) CFRP is a composite material that effectively exploits the advantages of carbon fibers framed by a polymer matrix. Its superior strength-to-weight ratio and good corrosion resistance and fatigue properties accelerate its application in engineering, such as in reinforcing, strengthening, and retrofitting structures.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Mechanical Properties of Carbon-fiber-reinforced Polymer Composites with Lead-free Piezoelectric Nanoparticles

Kurita¹,

Wang²,

Nagaoka³

et al. 2020

Sensors and Materials

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Wireless sensor networks (WSNs) are one of the key factors in realizing an Internet of Things (IoT) society. Piezoelectric materials that can convert mechanical energy into electric energy directly are highly promising as energy-harvesting materials for supplying power to wireless sensors. However, it is well known that lead zirconate titanate (PZT), which has the highest piezoelectric performance, is harmful to the environment. Moreover, the high density and brittleness of the piezoceramics hinder the fabrication of a long-life energy-harvesting device. In this study, we fabricated 0-3 structure piezoelectric composite materials consisting of lead-free piezoceramic nanoparticles, epoxy resin, and carbon-fiber-reinforced polymer (CFRP) and evaluated their mechanical properties. The maximum strain energy of the piezoelectric resin/CFRP composites was 20-40% larger than that of piezoelectric/epoxy composites. The maximum stress and flexural modulus of the lead-free piezoelectric potassium sodium niobate (KNN) nanoparticles/CFRP composite were approximately 5-10% larger than those of the barium titanate (BTO) nanoparticles/CFRP composite. Consequently, it is likely that better energy harvesting performance and mechanical properties can be obtained by using KNN nanoparticles than by using BTO nanoparticles.

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Enhanced mechanical and thermal properties of monocomponent high performance epoxy resin by blending with hydroxyl terminated polyethersulfone

Cited by 61 publications

References 35 publications

Enhancing the Mechanical and Thermal Properties of Epoxy Resin via Blending with Thermoplastic Polysulfone

Enhancing the Mechanical and Thermal Properties of Epoxy Resin via Blending with Thermoplastic Polysulfone

Thermoset modified with polyethersulfone: Characterization and control of the morphology

Fabrication and Mechanical Properties of Carbon-fiber-reinforced Polymer Composites with Lead-free Piezoelectric Nanoparticles

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