Epoxy/hollow glass microsphere syntactic foams for structural and functional application-A review

Anirudh, S.; Jayalakshmi, C.G.; Anand, Anoop; Kandasubramanian, Balasubramanian; Ismail, Sikiru Oluwarotimi

doi:10.1016/j.eurpolymj.2022.111163

Cited by 50 publications

(29 citation statements)

References 114 publications

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“…Research on porous beads has recently gained attention due to their excellent thermal properties. Porous microbead provide a large surface area and are used as an additive for the production of syntactic thermoset foams [18,19]. The most common techniques for fabricating porous microbead are based on immiscibility of resin materials and a medium phase, such as epoxy in water [20] and epoxy in oil [21].…”

Section: Gas Phase In Gel Stage  Foamablementioning

confidence: 99%

Novel Expandable Epoxy Beads and Epoxy Particle Foam

et al. 2022

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Expanded polymeric beads offer the advantage of being able to produce parts with complex geometries through a consolidation process. However, established polymeric beads are made of thermoplastics, deform and melt beyond their temperature services. In this manuscript, a new technique is proposed to fabricate expandable epoxy beads (EEBs), then expand and fuse them to produce epoxy particle foams (EPFs). This technique is called solid-state carbamate foaming technique. For production of EEBs, a mixture of epoxy, carbamate and hardener is prepared and poured into a 10 mL syringe. The mixture is manually extruded into 60 °C water to obtain a cylindric shape. The extrudate is then further cured to obtain an epoxy oligomer behaving rheological tan delta 3 and 2 at 60 °C. The extrudate is cut into pellets to obtain EEBs. The EEBs are then loaded into an aluminum mold and placed in an oven at 160 °C to expand, fuse to obtain EPFs of 212 kg/m3 and 258 kg/m3. The obtained EPFs provide a Tg of 150–154 °C. The fusion boundaries in EPFs are well formed. Thus, the produced EPFs exhibit a compressive modulus of 50–70 MPa, with a torsion storage modulus at 30 °C of 34–56 MPa.

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Section: Gas Phase In Gel Stage  Foamablementioning

confidence: 99%

Novel Expandable Epoxy Beads and Epoxy Particle Foam

et al. 2022

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“…The Taylor rod impact test was conducted by Rittel [33] to investigate the adiabatic shear failure of syntactic foam at higher impact velocities. The forefront of ESF for functional and structural applications, and the compressive properties, fracture and impact toughness of ESF can be found in a recent review of Anirudh et al [34].…”

Section: Introductionmentioning

confidence: 99%

Strain rate dependent compressive mechanical properties and dynamic failure of pre-strained epoxy syntactic foam

Zhang

Townsend

2023

Composites Part A: Applied Science and Manufacturing

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“…Thermoset plastic, especially epoxy resin, played an indispensable role in aerospace, shipbuilding and electronics due to its easy processing, low cost and stability (Anirudh et al ., 2022; Naik et al ., 2022; Kumar et al. , 2022; Wazeer et al ., 2022).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of an efficient phosphorus and triazine ring-containing reactive flame retardant for epoxy resin

Meng

Wang

et al. 2023

MMMS

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PurposeIn order to find an appropriate method to synthesize a new high-efficiency flame retardant for epoxy resin.Design/methodology/approachIn this work, a flame retardant with heterocyclic groups, HOMP, was acquired after removing the obstacle from triazines which was not readily soluble. The molecular structure, thermal and flame retardant properties were fully characterized and analyzed. Also, the mechanism was researched through multi-methodologies. As well, the authors evaluated the effects of HOMP on mechanical properties.FindingsThe results suggested that HOMP helped extinguish the combustion of specimens and could reach an LOI value of 29.2% and the V0 level in the UL-94 test with a phosphorus content of only 0.6wt%. With respect to the mechanism, HOMP was a gas-phase flame retardant and helped generate a thicker carbon protective coating. However, for the mechanical properties, the addition of HOMP enhanced the compressibility, while the tensile strength decreased significantly.Originality/valueThe approach not only simplified the operations but also obtained HOMP with excellent flame retardant properties.

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Epoxy/hollow glass microsphere syntactic foams for structural and functional application-A review

Cited by 50 publications

References 114 publications

Novel Expandable Epoxy Beads and Epoxy Particle Foam

Novel Expandable Epoxy Beads and Epoxy Particle Foam

Strain rate dependent compressive mechanical properties and dynamic failure of pre-strained epoxy syntactic foam

Synthesis of an efficient phosphorus and triazine ring-containing reactive flame retardant for epoxy resin

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