Investigating the transfer of toughness from rubber modified bulk epoxy polymers to syntactic foams

He, Sammy; Carolan, Declan; Fergusson, Alexander; Taylor, A. C.

doi:10.1016/j.compositesb.2022.110209

Cited by 8 publications

(3 citation statements)

References 60 publications

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“…[3][4][5] Consequently, toughening epoxy resin has been an intensively studied area for decades. To date, there are many viable modifiers which can toughen epoxy matrices, such as inorganic nanoparticles, [6][7][8][9][10] traditional rubbers, [11][12][13][14] and thermoplastic polymers. [15][16][17][18][19][20][21] All of these options are proven to have outstanding toughening effects.…”

Section: Introductionmentioning

confidence: 99%

Polydicyclopentadiene toughened epoxy resin and its carbon fiber composites via sequential polymerization

Cheng

Zhang

Chen³

et al. 2023

Polymer Composites

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In this work, a dicyclopentadiene monomer/Grubbs 2 catalyst was added to a mixture of epoxy oligomers and methyl nadic anhydride to obtain a poly‐dicyclopentadiene (DCPD) modified epoxy cross‐linked network via sequential curing. The hybrid resin was used as a matrix for preparing carbon fiber composites. The results indicated that the addition of DCPD monomers significantly reduced the viscosity of the epoxy resin. The toughness and heat resistance of the co‐cured resin was improved without significant loss of strength, which was attributed to the high compatibility between epoxy and the modifier polymer. Regarding the composites, the flexural strength of the hybrid resin‐derived composite first increased and then diminished slightly. Meanwhile, the mode‐I interlaminar fracture toughness continued to increase with the increase of PDCPD content compared to the non‐modified composites. Generally, the change trend of the above properties in the composites was consistent with the change trend of the strength and toughness exhibited in the bulk resin with increasing PDCPD contents, while the change extent was inconsistent due to factors such as fiber volume content and interfacial bonding.Highlights The epoxy/PDCPD hybrid resin system was obtained via sequential curing. The PDCPD as modifier can reduce the viscosity of the epoxy curing system. The toughness and heat resistance of the PDCPD modified epoxy resin was improved. The loss in flexural strength of the hybrid resin system was insignificant. The GIC of the epoxy composites modified with PDCPD improved appreciably.

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Section: Introductionmentioning

confidence: 99%

Polydicyclopentadiene toughened epoxy resin and its carbon fiber composites via sequential polymerization

Cheng

Zhang

Chen³

et al. 2023

Polymer Composites

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“…As an important component of polymeric syntactic foams, hollow particles can be produced by various materials, including glass, carbon, ceramic, and metal. Among them, hollow glass and fly ash microspheres as the reinforcing fillers have been widely investigated. − Nevertheless, the interface incompatibility between the inorganic hollow particle and the polymeric matrix usually sacrifices mechanical properties of syntactic foams. The surface treatment for inorganic hollow particles by grafting polymer compatibilizers and coupling agents is an effective and practical solution. , However, these pre-processing measures easily cause the inevitable defects on the hollow surface glass/carbon microspheres, which weakens the durability of syntactic foams.…”

Section: Introductionmentioning

confidence: 99%

Teardrop-Shaped Hollow Polystyrene Nanoparticles for Improving the Mechanical and Thermal Properties of Polyvinyl Alcohol-Based Syntactic Foam Films

Chen,

Cao,

Wang

et al. 2023

ACS Appl. Nano Mater.

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The application of polyvinyl alcohol (PVA) films is still restricted due to their poor hydrophilicity, mechanical strength, and thermal stability. To improve these properties, a teardrop-shaped hollow polystyrene (HPS) nanoparticle was prepared in this work and further applied as the reinforcing nanomaterial. Herein, a teardrop-shaped silica nanoparticle was first used as the hard template; polystyrene was in situ-synthesized on the surface of teardrop-shaped silica, followed by the etching of the silica template. By tuning the synthesis parameters (e.g., styrene concentration and etching time), the optimal structure of HPS was obtained; subsequently, HPS was mixed with PVA by a solution-mixing method, which in turn produced the PVA-based synthetic foam film. Using optimal synthesis parameters of HPS and its loadings, the obtained syntactic foam films exhibited high transparency, excellent mechanical strength and toughness, and good thermal stability. Compared to pure PVA film, the tensile strength and toughness of PVA-based syntactic foam films containing 1.0 wt % HPS were improved by about 55 and 77%, respectively; the glass transition temperature and onset decomposition temperature of PVA-based syntactic foam films increased to about 32 and 66 °C, respectively. The research exemplifies the great promise of HPS toward practical application in polymer syntactic foams.

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“…Syntactic foam is a composite material consisting of a matrix filled with hollow microspheres [29]. The microspheres, which are typically made of glass [30,31], ceramic [32,33], or polymer, are dispersed throughout the matrix material, which can be made from polymers [34,35], metals [36][37][38], or concrete and ceramics [39][40][41][42]. Metal foams have lightweight and high-energy absorption properties.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characteristics of High-Performance, Low-Density Metallo–Ceramics Composite

Abramovskis,

Drunka,

Csáki

et al. 2023

Materials

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By applying the physical vapour deposition method, hollow ceramic microspheres were coated with titanium, and subsequently, they were sintered using the spark plasma sintering technique to create a porous ceramic material that is lightweight and devoid of a matrix. The sintering process was carried out at temperatures ranging from 1050 to 1200 °C, with a holding time of 2 min. The samples were subjected to conventional thermal analyses (differential scanning calorimetry, thermogravimetry, dilatometry), oxidation resistance tests, and thermal diffusivity measurements. Phase analysis of the samples was performed using the XRD and the microstructure of the prepared specimens was examined using electron microscopy. The titanium coating on the microspheres increased the compressive strength and density of the resulting ceramic material as the sintering temperature increased. The morphology of the samples was carefully examined, and phase transitions were also identified during the analysis of the samples.

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Investigating the transfer of toughness from rubber modified bulk epoxy polymers to syntactic foams

Cited by 8 publications

References 60 publications

Polydicyclopentadiene toughened epoxy resin and its carbon fiber composites via sequential polymerization

Polydicyclopentadiene toughened epoxy resin and its carbon fiber composites via sequential polymerization

Teardrop-Shaped Hollow Polystyrene Nanoparticles for Improving the Mechanical and Thermal Properties of Polyvinyl Alcohol-Based Syntactic Foam Films

Preparation and Characteristics of High-Performance, Low-Density Metallo–Ceramics Composite

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