Mechanical Characterization of DCPD and ENB Healing Systems in Glass Fibre Composites

Vintila, Ionut Sebastian; Badea, Teodor; Draghici, Sorin; Petrescu, Horia Alexandru; Cucuruz, Andreia; Iovu, Horia; Hadăr, Anton

doi:10.37358/mp.20.1.5337

Cited by 4 publications

(5 citation statements)

References 17 publications

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“…Chemical substances used in the production of melamine-urea-formaldehyde (MUF) microcapsules with embedded 5-ethylidene-2-norbornene (ENB). Microcapsules from the same batch, synthesized by in situ polymerization, were used, as presented in [33]. The fabrication of MUF-ENB microcapsules required four solutions to be prepared.…”

Section: Methodsmentioning

confidence: 99%

“…Microcapsules from the same batch, synthesized by in situ polymerization, were used, as presented in [33]. In a 600 mL tall-form glass beaker, two solutions were initially prepared: a solution containing 150 mL distilled water, 7 g urea, 0.5 g resorcinol, and 0.5 g ammonium chloride, and a solution containing 100 mL co-polymer 5 wt % maleic anhydride.…”

Section: Synthesis Of Puf-dcpd Microcapsulesmentioning

confidence: 99%

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The Synthetization and Analysis of Dicyclopentadiene and Ethylidene-Norbornene Microcapsule Systems

et al. 2020

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The activities of this paper were focused on an in-situ fabrication process for producing two self-healing systems containing dicyclopentadiene and 5-ethylidene-2-norbornene monomers encapsulated in a urea-formaldehyde shell and integration methods applied in the epoxy matrix to analyse and compare the influences of their integration into the neat epoxy matrix. The self-healing systems were first synthesized according to a literature review, and subsequently, an optimization process was conducted for the fabrication process. Neat epoxy specimens were fabricated as reference specimens and subjected to flexural tests. Several integration methods for incorporating the self-healing systems into the epoxy resin were investigated. The optimal method presenting the best dispersion of the healing system was achieved by reducing the viscosity of the epoxy matrix with 10 vol % acetone solution, the addition of a microcapsule in the matrix, and homogenization at 60 °C at 100 rpm. Thermal analysis was performed in order to observe the mass loss obtained with an increasing temperature and phase changes for both poly-urea-formaldehyde (PUF)-dicyclopentadiene (DCPD) and melamine-urea-formaldehyde (MUF)-5-ethylidene-2-norbornene (ENB) systems. The thermogravimetric analysis performed for the PUF-DCPD system indicates a total loss of mass in the range of 30–500 °C of 72.604% and for the MUF-ENB system, indicates a total mass loss in the range of 30–500 °C of 74.093%. Three-point bending tests showed higher mechanical properties for PUF-DCPD (80%) than MUF-ENB (40%) compared to the neat epoxy systems. Numerical simulations were performed to obtain a better understanding of the microcapsule behavior when embedded in an epoxy matrix.

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Section: Methodsmentioning

confidence: 99%

Section: Synthesis Of Puf-dcpd Microcapsulesmentioning

confidence: 99%

The Synthetization and Analysis of Dicyclopentadiene and Ethylidene-Norbornene Microcapsule Systems

et al. 2020

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“…As the research progresses, researchers have developed more efficient healing agents based on ROMP reactions. Vintil a et al 59 embedded microcapsules with 5-ethylene-2-norbornene (ENB) in glass fiber reinforcement polymer (GFRP) composites and compared them F I G U R E 4 Schematic of the healing agent delivery mechanism utilized by the mendable epoxy resins containing EMAA particles. 55 F I G U R E 5 (A) Insertion of mesh in the agitator.…”

Section: Microcapsulesmentioning

confidence: 99%

“…As the research progresses, researchers have developed more efficient healing agents based on ROMP reactions. Vintilă et al 59 embedded microcapsules with 5‐ethylene‐2‐norbornene (ENB) in glass fiber reinforcement polymer (GFRP) composites and compared them with the DCPD counterpart. The results showed that the urea‐formaldehyde microcapsules prepared by the same method were smaller in diameter for ENB (30–100 μm) than for DCPD (100–250 μm).…”

Section: Extrinsic Self‐healing Compositesmentioning

confidence: 99%

Intrinsic and extrinsic self‐healing fiber‐reinforced polymer composites: A review

Wang,

Tang,

Chen

et al. 2023

Polymer Composites

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With their high specific modulus, high specific strength and designability, fiber‐reinforced polymer (FRP) composites have replaced or surpassed traditional metallic materials in a wide range of applications. However, the polymer matrix of commonly used FRP composites is usually a thermosetting polymer that is difficult to rework once formed, which implants a substantial challenge for the repair and recycling of composites. Self‐repair, as an emerging method of repairing polymer‐based materials, has the advantages of simplification, high efficiency and repeatability against traditional repair methods. Research on self‐healing polymer materials is developing rapidly and becoming more systematic. With the development of self‐healing polymer, polymer‐based composites with self‐healing capabilities are becoming possible. This paper reviews the current development of self‐healing polymers in recent years, with specific emphasis on their applications in FRP composites. According to the difference in healing mechanisms, the self‐healing polymer composites are split into two categories, intrinsic and extrinsic ones. The essential concepts and different types of intrinsic and extrinsic self‐healing composites are first introduced. Then, their pros and cons are discussed, respectively. Finally, the perspectives of intrinsic as well as extrinsic self‐healing FRP composites are put forward.Highlights Development of self‐healing fiber‐reinforced polymer composites. Extrinsic and intrinsic self‐healing fiber‐reinforced polymer composites. Pros and cons of self‐healing fiber‐reinforced polymer composites. Perspectives of self‐healing fiber‐reinforced polymer composites.

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“…[16] studied the low velocity impact properties of different hybrid fibre reinforced composite laminates and it was concluded that the best performances were obtained for laminates that have glass fibre external layers. Beside these studies, many researches were conducted in the last decade regarding hybrid fibre reinforced polymeric composites [7,17,18], 3D printed fibre reinforced composites [19][20][21], and even self-healing fibre reinforced polymeric composites [22,23].…”

Section: Introductionmentioning

confidence: 99%

Influence of Shelf Life on Mechanical Properties of Glass Fibre Reinforced Composites

Condruz¹,

Vintila²,

Frigioescu³

et al. 2021

Mater. Plast.

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The present paper was focused on studying the influence of shelf life of an epoxy matrix on the mechanical properties of glass fibre reinforced composites. For the study, two types of the same epoxy system were used, one during its shelf life and one out of its shelf life. The reinforcement used consisted in E-glass fibre fabric. Mechanical investigations were realized in order to compare the materials in terms of loss of mechanical strength and elastic properties. Therefore, three mechanical tests were performed: tensile tests, in-plane shear and open-hole tensile tests. The results showed that the shelf life affects the mechanical properties of the polymeric composite. A decrease of 24% in tensile strength was recorded along with a 28% decrease of the in-plane shear strength and 55% of open-hole tensile strength for the composite manufactured with the out of shelf life epoxy system compared with the other composite. An overall reduction of mechanical strength and elastic properties of the composite material was observed, primarily due to polymeric matrix degradation, which after long periods it could be prone to brittleness and susceptible to delamination and fracture. The thermogravimetric analysis showed that thermal induced changes are happening at a higher speed in the out of shelf life composite, a lower mass loss being registered for new epoxy composite.

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Mechanical Characterization of DCPD and ENB Healing Systems in Glass Fibre Composites

Cited by 4 publications

References 17 publications

The Synthetization and Analysis of Dicyclopentadiene and Ethylidene-Norbornene Microcapsule Systems

The Synthetization and Analysis of Dicyclopentadiene and Ethylidene-Norbornene Microcapsule Systems

Intrinsic and extrinsic self‐healing fiber‐reinforced polymer composites: A review

Influence of Shelf Life on Mechanical Properties of Glass Fibre Reinforced Composites

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