The influence of removing sizing on strength and stiffness of conventional and high modulus E-glass fibres

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“…This effect is not observed for the AF specimens and may be explained by a different sizing-matrix-compatibility of AF to VE and EP. 65…”

Section: Resultsmentioning

confidence: 99%

“…This effect is not observed for the AF specimens and may be explained by a different sizing-matrix-compatibility of AF to VE and EP. 65 The stiffness maximum is at ' ¼ 0 along the fibre direction for GF and AF specimens. The small amount of weft thread in the AF fabric leads to a stiffness increase for ' ¼ 90 .…”

Section: Static Mechanical Testingmentioning

confidence: 95%

Damping properties of non-conductive composite materials for applications in power transmission pylons

Kliem¹,

Rüppel

Høgsberg³

et al. 2018

Journal of Composite Materials

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“…Glass fibers are also among the most commonly used reinforcements, offering a good compromise between satisfying mechanical properties and ease of manufacturing [4]. The mechanical behavior of glass fiber-reinforced polymer composites highly depends on the applied surface treatment and sizing of the fibers [5]. Sizing plays a crucial role in load transfer at the interface between the polymer matrix and fibers.…”

Section: Introductionmentioning

confidence: 99%

“…In the case of glass fibers, the most commonly used coupling agents are organosilanes, which form covalent bonds by reacting on one side with the silanol groups at the fiber (or particulate) surface, via condensation reactions after hydrolysis of the alkoxy groups [7]. Silanes can also contain complementary functional groups creating bonds with the polymer matrix [5]. The surface density of the grafted silane agent is a particularly important parameter since it strongly impacts the composite properties [11,12].…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Hydroxyl Density of Glass Surface for Anionic Ring-Opening Polymerization of Polyamide 6 to Manufacture Thermoplastic Composites

et al. 2022

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Reactive thermoplastics matrices offer ease of processing using well-known molding techniques (such as Resin Transfer Molding) due to their initially low viscosity. For Polyamide 6 (PA6)/glass composites, the hydroxyl groups on the glass surface slow down the anionic ring-opening polymerization (AROP) reaction, and can ultimately inhibit it. This work aims to thoroughly control the hydroxyl groups and the surface chemistry of glass particulates to facilitate in situ AROP-an aspect that has been barely explored until now. A model system composed of a PA6 matrix synthesized by AROP is reinforced with calcinated and silanized glass microparticles. We systematically quantify, by TGA and FTIR, the complete particle surface modification sequence, from the dehydration, dehydroxylation and rehydroxylation processes, to the silanization step. Finally, the impact of the particle surface chemistry on the polymerization and crystallization of the PA6/glass composites was quantified by DSC. The results confirm that a careful balance is required between the dehydroxylation process, the simultaneous rehydroxylation and silane grafting, and the residual hydroxyl groups, in order to maintain fast polymerization and crystallization kinetics and to prevent reaction inhibition. Specifically, a hydroxyl concentration above 0.2 mmol OH·g−1 leads to a slowdown of the PA6 polymerization reaction. This reaction can be completely inhibited when the hydroxyl concentration reaches 0.77 mmol OH·g−1 as in the case of fully rehydroxylated particles or pristine raw particles. Furthermore, both the rehydroxylation and silanization processes can be realized simultaneously without any negative impact on the polymerization. This can be achieved with a silanization time of 2 h under the treatment conditions of the study. In this case, the silane agent gradually replaces the regenerated hydroxyls. This work provides a roadmap for the preparation of reinforced reactive thermoplastic materials.

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“…Hybrid fibre-based polymer composites are created all over the world to give designers greater creative freedom when creating composites and to provide features that cannot be achieved in binary systems using only a kind of fibre or filler discrete in the matrix [23,24]. They provide balanced strength and stiffness, increased bending and mechanical characteristics, improved fatigue and impact resistance, improved fracture toughness and crack arresting qualities, and decreased weight and cost.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Arecanut and GFR Hybrid Polypropylene Composites

Rao

Ahmad

Battula³

et al. 2022

Advances in Polymer Technology

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The mechanical characteristics of hybrid polypropylene composites may be enhanced by adjusting the fibre loading and ratio, according to this study. The hot press technique was utilised to generate a variety of composites with four different amounts of fibre loading. In addition, the fibre ratio in composites with a 20-weight-percent fibre loading was changed. The composites were characterised using Fourier transform infrared analysis as well as tensile, flexural, and hardness tests. In the composites that have been created, Fourier transform infrared examination showed that hemicelluloses, lignins, and moisture were present, all of which have the potential to reduce tensile strength. Fibre loading resulted in a decrease in tensile strength but an increase in Young’s modulus. With increasing fibre loading, flexural modulus and hardness rose, whereas flexural strength declined. The best mechanical qualities were found in a composite made primarily of arecanut and glass fibres, with a weight ratio of 1 : 3.

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The influence of removing sizing on strength and stiffness of conventional and high modulus E-glass fibres

Cited by 5 publications

References 18 publications

Damping properties of non-conductive composite materials for applications in power transmission pylons

Damping properties of non-conductive composite materials for applications in power transmission pylons

Tailoring the Hydroxyl Density of Glass Surface for Anionic Ring-Opening Polymerization of Polyamide 6 to Manufacture Thermoplastic Composites

Mechanical Properties of Arecanut and GFR Hybrid Polypropylene Composites

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