Effect of UV irradiation on epoxy adhesives and adhesively bonded joints reinforced with BN and B4C nanoparticles

Korkmaz, Yasemin; Gülteki̇n, Kürşat

doi:10.1016/j.polymdegradstab.2022.110004

Cited by 25 publications

(14 citation statements)

References 32 publications

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“…Interestingly, the storage modulus of five EA composites at various temperatures increased substantially after prolonged UV‐based exposure. The increase in the modulus may be related to post‐crosslinking or rearrangement reaction 11,17,37 . According to previous SEM studies, the EA binder in this research was a resin‐based composite and had a sea‐island structure with asphalt as the dispersed phase 4 .…”

Section: Resultsmentioning

confidence: 93%

“…The increase in the modulus may be related to post-crosslinking or rearrangement reaction. 11,17,37 According to previous SEM studies, the EA binder in this research was a resinbased composite and had a sea-island structure with asphalt as the dispersed phase. 4 Decreased tensile strength and increased modulus of these EA composites in this research is consistent with the photodegradable results of epoxy-resin polymers.…”

Section: Dynamic Mechanical Propertiesmentioning

confidence: 99%

“…4 Decreased tensile strength and increased modulus of these EA composites in this research is consistent with the photodegradable results of epoxy-resin polymers. 11,37 It is well known that UV absorbers release the absorbed UV energy in the form of heat, which may increase the modulus of EA binders in a thermal environment. However, Figure 6 showed that the growth rate of storage modulus for the four EA composites containing UV-531 absorbers was significantly slower, especially at 0.9-1.2 wt%, compared to those without absorbers.…”

Section: Dynamic Mechanical Propertiesmentioning

confidence: 99%

“…Under a long‐term service period, both asphalt and epoxy resin undergo various performance degradations under external environmental factors. These factors involve high temperature, sunlight (principally ultraviolet), oxygen, water, or a combination of these effects 6–11 . Herein, thermal‐oxidative aging affects the performance of EA binder, specifically increased modulus, reduced phase angle, and agglomeration of asphalt part 12–14 .…”

Section: Introductionmentioning

confidence: 99%

“…These factors involve high temperature, sunlight (principally ultraviolet), oxygen, water, or a combination of these effects. [6][7][8][9][10][11] Herein, thermal-oxidative aging affects the performance of EA binder, specifically increased modulus, reduced phase angle, and agglomeration of asphalt part. [12][13][14] These effects can be attributed to post-curing or oxidation in the binder.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of properties and aging resistance of epoxy asphalt composite modified by ultraviolet absorber

Wang

Min

Wong

et al. 2023

J of Applied Polymer Sci

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This research investigated the effect of ultraviolet absorber (UV‐531) on the properties of epoxy asphalt (EA) binders. EA binders were modified by adding UV‐531 absorber at contents of 0, 0.3, 0.6, 0.9, and 1.2 wt%, and composites were then subjected to ultraviolet (UV)‐based aging, including UV, oxygen, and heat treatment. Laboratory tests were conducted to assess UV absorption, viscosity, mechanical parameters, contact angle, microstructure, and chemical functional groups of absorber‐modified EA composites before and after aging. The results showed that the addition of UV‐531 resulted in enhanced UV absorption capacity, lower initial viscosity, and longer allowable application time for EA composites. The UV‐531 absorber has good compatibility with EA binders and does not weaken the performance of EA binders. From anti‐aging perspective, UV‐531 absorber effectively delayed the degradation of the physical, mechanical, and chemical structures of EA composites. The breakage of alkyl and ester groups of EA composites containing absorber was significantly reduced under aging conditions. Overall, the presence of UV‐531 retarded severe performance deterioration in EA composite. Considering aging improvement and economic cost, it is recommended to use a content of 0.9 wt% UV‐531 absorber as an anti‐aging agent for EA composites.

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Section: Resultsmentioning

confidence: 93%

Section: Dynamic Mechanical Propertiesmentioning

confidence: 99%

Section: Dynamic Mechanical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of properties and aging resistance of epoxy asphalt composite modified by ultraviolet absorber

Wang

Min

Wong

et al. 2023

J of Applied Polymer Sci

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Long‐term performance of single‐lap joints: Review, challenges and prospects in civil engineering

Shu,

Qiang,

Jiang

et al. 2023

Engineering Reports

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Compared with traditional technology, bonding technology is more suitable for civil structure reinforcement because of its cost‐efficiency and superior mechanical properties. However, research on the long‐term performance of single‐lap joints (SLJs) requires better organization and comprehension. This article aims to investigate the long‐term performance and optimization design of SLJs. The main factors influencing the long‐term performance of SLJs from both material and component levels are discussed. The moisture diffusion mechanisms of bulk adhesives and the degradation mechanisms of SLJs are explored. Moreover, the optimization design of SLJs focuses on evaluating the overlap length, adhesive layer thicknesses, and changes in adhesives along the overlap length based on available literature. It is found that the applicability of diffusion models should be validated, and the selection of the models should consider working environments and types of adhesives. Exploring failure mechanisms and design criteria for the mixed SLJs in hygrothermal environments with/without sustained or alternating load is significant for the optimization design. This article indicates the limitations on the shear strength and long‐term performance of SLJs in available studies and provides insights into the challenges and prospects of their optimization design.

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Influence of amine surface treatments of carbon nanotube and boron nitride hybrid fillers on the thermal and mechanical properties of flexible amine‐based acrylate composites via 3D vat photopolymerization

Cho,

Han

et al. 2024

Polymers for Advanced Techs

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Owing to the rapid advancement in electronic devices, thermal interface materials have been introduced to solve the thermal dissipation and electrical insulation problems in electronic parts and packaging materials. In this study, flexible thermally conductive acrylate‐based composites were fabricated via 3D vat photopolymerization. The effects of amine functional groups on the thermal and mechanical properties of acrylate polymers were explored. Surface‐treatment agents, namely, (3‐aminopropyl)triethoxysilane (APTES) and octadecylamine (ODA), were selected to enhance the poor dispersibility of fillers in the resin matrix caused by aggregation. The APTES‐treated carbon nanotube (CNT)–boron nitride (BN) hybrid composite exhibited the highest thermal conductivity of 0.990 W m−1 K−1, which was remarkably 482.35% higher than that of the matrix owing to the addition of 30 wt% BN, 0.5 wt% CNTs, and APTES treatment. The ODA‐treated CNT composite, which contained only 0.5 wt% CNTs, exhibited a thermal conductivity of 0.540 W m−1 K−1, which was 217.65% higher than that of the matrix. The electrical insulation properties of the composites were characterized, and the composites exhibited low electrical conductivity as electrical insulation materials. The advantages of the 3D‐printed flexible thermally conductive acrylate polymers usher in a new era of using polymer composites to address heat dissipation problems in complex structures.

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Effect of UV irradiation on epoxy adhesives and adhesively bonded joints reinforced with BN and B4C nanoparticles

Cited by 25 publications

References 32 publications

Evaluation of properties and aging resistance of epoxy asphalt composite modified by ultraviolet absorber

Evaluation of properties and aging resistance of epoxy asphalt composite modified by ultraviolet absorber

Long‐term performance of single‐lap joints: Review, challenges and prospects in civil engineering

Influence of amine surface treatments of carbon nanotube and boron nitride hybrid fillers on the thermal and mechanical properties of flexible amine‐based acrylate composites via 3D vat photopolymerization

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