Investigation of water absorption in pultruded composites containing fillers and low profile additives

Daly, Hachmi Ben; Brahim, H. Ben; Hfaied, N.; Harchay, Manel; Boukhili, Rachid

doi:10.1002/pc.20243

Cited by 63 publications

(17 citation statements)

References 19 publications

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“…It is due to the presence of large salt molecules in seawater (notably sodium chloride). The diffusion process into the matrix of the composite materials results in lower absorption kinetic parameters . In the present study, Cured pure VE resin does not absorb water in normal water and cold water environments.…”

Section: Resultsmentioning

confidence: 46%

Evaluation of mechanical and thermal properties of tamarind seed filler reinforced vinyl ester composites

Stalin¹,

Nagaprasad²,

Vignesh³

et al. 2019

Vinyl Additive Technology

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This article deals with the usage of tamarind seed filler (TSF) as reinforcement in vinyl ester (VE) composites. The composite plates have been fabricated by compression molding machine with TSFs of varying wt% from 5 to 50 as reinforcement material, and their properties such as tensile, flexural, impact, hardness, water absorption, heat deflection tests, and thermogravimetric analysis are studied. The mechanical properties of TSF reinforced VE composites are optimum at 15 wt% filler. The tensile strength and flexural strength of TSF‐VE composites are estimated to be around 34.1 and 121 MPa, respectively. The better impact strength of TSF‐VE composites is found to be 14.02 kJ/m2, and barcol hardness can hold a value up to 42.33. Thermo gravimetric analysis and heat deflection test of TSF reinforced VE composite have improved the thermal stability. The fiber matrix interaction of the fractured mechanical testing specimen has been analyzed by scanning electron microscope. The TSF‐VE composites are used to fabricate the wheel hubcap of heavy‐duty buses, bus seat backrest cover, and silencer guard of the motorcycle. J. VINYL ADDIT. TECHNOL., 25:E114–E128, 2019. © 2019 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 46%

Evaluation of mechanical and thermal properties of tamarind seed filler reinforced vinyl ester composites

Stalin¹,

Nagaprasad²,

Vignesh³

et al. 2019

Vinyl Additive Technology

View full text Add to dashboard Cite

show abstract

“…However, at low immersion times, Figure 7a, it can be seen how the weight gain in the curves of the composites stops being gradual and a rapid increase in weight appears between 10 and 12 h of immersion in all of them. This can be due to the appearance of deformations or damage to the matrix for that immersion time, such as the appearance of microcracks due to the swelling of the filler or the fiber/matrix debonding [77]. As shown in Table 4, the water saturation of composites increases as the filler content does.…”

Section: Thermo-mechanical Propertiesmentioning

confidence: 99%

Manufacturing and Characterization of Green Composites with Partially Biobased Epoxy Resin and Flaxseed Flour Wastes

et al. 2020

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In the present work, green-composites from a partially biobased epoxy resin (BioEP) reinforced with lignocellulosic particles, obtained from flax industry by-products or wastes, have been manufactured by casting. In this study, the flaxseed has been crushed by two different mechanical milling processes to achieve different particle sizes, namely coarse size (CFF), and fine size (FFF) particle flaxseed flour, with a particle size ranging between 100–220 µm and 40–140 µm respectively. Subsequently, different loadings of each particle size (10, 20, 30, and 40 wt%) were mixed with the BioEP resin and poured into a mold and subjected to a curing cycle to obtain solid samples for mechanical, thermal, water absorption, and morphological characterization. The main aim of this research was to study the effect of the particle size and its content on the overall properties of composites with BioEP. The results show that the best mechanical properties were obtained for composites with a low reinforcement content (10 wt%) and with the finest particle size (FFF) due to a better dispersion into the matrix, and a better polymer-particle interaction too. This also resulted in a lower water absorption capacity due to the presence of fewer voids in the developed composites. Therefore, this study shows the feasibility of using flax wastes from the seeds as a filler in highly environmentally friendly composites with a wood-like appearance with potential use in furniture or automotive sectors.

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“…The observation of experimental results indicates that the diffusion kinetics studied is not fickian and by the way, experimental results of diffusion cannot be represented using Eq. with a constant diffusion coefficient D. Indeed, when diffusion is purely fickian, the slope of the absorption curve is constant and coefficient D can be estimated from this slope between time t 1 and t 2 using :

D = π {true(\frac{h}{4 M_{normals}} true)}^{2} \times {true(\frac{M_{2} - M_{1}}{\sqrt{t_{2}} - \sqrt{t_{1}}} true)}^{2}

…”

Section: A New Non‐fickian Modelmentioning

confidence: 99%

Hygrothermal effect on moisture kinetics and mechanical properties of hemp/polypropylene composite: Experimental and numerical studies

et al. 2015

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The exposition of thermoplastic composites reinforced with natural fibers to moisture and heat is likely to lower their mechanical properties and restrain their use in the design of parts. The present work is focussed on investigating the effects of hygrothermal aging on the mechanical behaviour of injected polypropylene reinforced with short hemp fibers. Moreover, the kinetic of isothermal moisture absorption has been studied for four immersion temperatures. The experimental results show that the time taken to reach saturation decreases significantly with increase in immersion temperature. These tests also reveal that moisture absorption in this type of materials does not follow Fick's law. Thus, a new model is proposed to predict this behaviour by the use of a variable coefficient of diffusion. This model is implemented using both analytical and finite element analysis (FEA) approaches. The results obtained with this new model show a very good correlation between experimental, analytical, and FEA absorption curves.

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Investigation of water absorption in pultruded composites containing fillers and low profile additives

Cited by 63 publications

References 19 publications

Evaluation of mechanical and thermal properties of tamarind seed filler reinforced vinyl ester composites

Evaluation of mechanical and thermal properties of tamarind seed filler reinforced vinyl ester composites

Manufacturing and Characterization of Green Composites with Partially Biobased Epoxy Resin and Flaxseed Flour Wastes

Hygrothermal effect on moisture kinetics and mechanical properties of hemp/polypropylene composite: Experimental and numerical studies

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