Compressive properties of co-continuous hollow glass microsphere/epoxy resin syntactic foams prepared using resin transfer molding

Ding, Junjie; Liu, Qiang; Ye, Feng; Zhang, Haoqian; Gao, Ye; Zhang, Biao

doi:10.1177/0731684419877568

Cited by 11 publications

(6 citation statements)

References 43 publications

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“…One important peculiarity of syntactic foams, which allows their wide application in the marine environment [ 46 , 47 ], is their high compression strength. Therefore, quasi-static compression tests were conducted on the prepared foams, to study the trends of the compressive elastic modulus (E C ), the specific elastic modulus (E C /

), the stress at 20% of strain (σ 20 ), and the specific stress at 20% of strain (σ 20 /

) with the amount of PCM and HGMs.…”

Section: Resultsmentioning

confidence: 99%

Development of Novel Polypropylene Syntactic Foams Containing Paraffin Microcapsules for Thermal Energy Storage Applications

et al. 2022

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polypropylene (PP) syntactic foams (SFs) containing hollow glass microspheres (HGMs) possess low density and elevated mechanical properties, which can be tuned according to the specific application. A possible way to improve their multifunctionality could be the incorporation of organic Phase Change Materials (PCMs), widely used for thermal energy storage (TES) applications. In the present work, a PCM constituted by encapsulated paraffin, having a melting temperature of 57 °C, was embedded in a compatibilized polypropylene SF by melt compounding and hot pressing at different relative amounts. The rheological, morphological, thermal, and mechanical properties of the prepared materials were systematically investigated. Rheological properties in the molten state were strongly affected by the introduction of both PCMs and HGMs. As expected, the introduction of HGMs reduced both the foam density and thermal conductivity, while the enthalpy of fusion (representing the TES capability) was proportional to the PCM concentration. The mechanical properties of these foams were improved by the incorporation of HGMs, while they were reduced by addition of PCMs. Therefore, the combination of PCMs and HGMs in a PP matrix generated multifunctional materials with tunable thermo-mechanical properties, with a wide range of applications in the automotive, oil, textile, electronics, and aerospace fields.

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), the stress at 20% of strain (σ 20 ), and the specific stress at 20% of strain (σ 20 /

) with the amount of PCM and HGMs.…”

Section: Resultsmentioning

confidence: 99%

Development of Novel Polypropylene Syntactic Foams Containing Paraffin Microcapsules for Thermal Energy Storage Applications

et al. 2022

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“…Matrix porosity can also form a closed-cell structure when it has a very small amount of volume fraction, this also affects its morphology and structure. The strength of the syntactic foam composites can be greatly reduced by too much matrix porosity and therefore should be avoided by all means and could also lead to an increase in foam moisture absorption [21,22]. This can be calculated using the percentage difference between the theoretical density and the calculated/measured density (𝜌𝜌 𝑡𝑡 ), (𝜌𝜌 𝑚𝑚 ) respectively from the given formula, Eq.…”

Section: Porosity Calculation Of Microballoonsmentioning

confidence: 99%

Loading Effect of Hollow Glass Microsphere (HGM) and Foam Microstructure on the Specific Mechanical Properties and Water Absorption of Syntactic Foam Composite

Afolabi

Kanny

Mohan

2021

JERA

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Epoxy syntactic foams (SF) filled with hollow glass microspheres (HGM) were prepared by simple resin casting method and characterization in this study. The effect of varying the amount of HGM on the specific mechanical and water absorption properties of SF composites were investigated. Five different composition of SF (SFT60-0.5 to SFT60-2.5) were compared with the neat epoxy matrix. The wall thickness of the microballoons differ because of its different percentile size distribution (10th, 50th and 90th), which reflects in its density variation. The results show that the specific tensile and flexural strength increases with an increasing filler (HGM) content. The density of SF filled with HGM reduces with increasing volume fraction of filler content. Scanning electron microscopy was done on the failed samples to examine the fractured surfaces. The water absorption capacity of the SF was also investigated as it relates to the HGM volume fraction variation. All the syntactic foam composition shows a better diffusion coefficient capacity than the neat epoxy resin. This makes it applicable in structural purposes and several marine application products such as Autonomous Ultimately Vehicle (AUV).

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“…In addition, they are made of bromo-silicon glass, which makes them chemically inert. Due to this facts, glass microspheres have many applications in the processing of plastics, among others, to reduce the mass of products in which the content of glass microballoons reaches 40-60% creating syntactic foams [1][2][3], reduce the thermal conductivity of plastics [4,5], improve dielectric properties [6], acoustic properties [7] or as flame retardant additives [3,8]. However, the mechanical properties of polymer composites decrease, with glass microsphere loading [5,9,10].…”

Section: Kompozycje Nienasyconych żYwic Poliestrowych Stosowane Na Wamentioning

confidence: 99%

Compositions of unsaturated polyester resins used for facing layers of laminates

Oliwa

2020

Polimery

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Hybrid composites of unsaturated polyester resin with the addition of glass microspheres and bentonite modified with a quaternary ammonium salt were obtained. The content of bentonite in composites was 3 wt %, while glass microspheres varied in the range of 5-15 wt %. The effect of the addition of glass microspheres on the rheological and mechanical properties of unsaturated polyester resin composites containing modified bentonite was investigated. On the basis of the obtained results, it was found that the optimum content of glass microspheres in polyester composites at which a clear increase in the value of most mechanical parameters was achieved, is 15 wt %. The Young's modulus, flexural modulus, tensile strength, and Charpy impact strength increased by 14.7, 38.7, 17.7 and 25%, respectively, compared to the unmodified resin. On the other hand, with relation to the sample containing 3 wt % of bentonite, a significant improvement was achieved only in the case of the flexural modulus and impact strength, amounting to 16.5 and 36.0%, respectively. In addition, composite with 15 wt % of glass microspheres was characterized by a smaller, by about 25%, flexural strength in relation to the unfilled resin and resin with 3 wt % of bentonite. In turn, rheological studies have shown that as the content of glass microspheres increased, there was an increase in viscosity and a decrease in gelation time in relation to the reference sample and the sample with 3 wt % of bentonite.

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Compressive properties of co-continuous hollow glass microsphere/epoxy resin syntactic foams prepared using resin transfer molding

Cited by 11 publications

References 43 publications

Development of Novel Polypropylene Syntactic Foams Containing Paraffin Microcapsules for Thermal Energy Storage Applications

Development of Novel Polypropylene Syntactic Foams Containing Paraffin Microcapsules for Thermal Energy Storage Applications

Loading Effect of Hollow Glass Microsphere (HGM) and Foam Microstructure on the Specific Mechanical Properties and Water Absorption of Syntactic Foam Composite

Compositions of unsaturated polyester resins used for facing layers of laminates

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