Mechanical Characteristics and Thermal Stability of Hybrid Epoxy and Acrylic Polymer Coating/Nanoclay of Various Thicknesses

Abd‐Elnaiem, Alaa M.; Salman, Osamah S.; Hakamy, A.; Hussein, Seenaa I.

doi:10.1007/s10904-022-02270-8

Cited by 26 publications

(11 citation statements)

References 44 publications

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“…The samples were immersed in the brine for 24 h. After removal, the surface water of the samples was wiped and weighed, marking the mass m 2 . The water absorption rate W was calculated by the Equation (3).…”

Section: Performance Testing and Characterization Methodsmentioning

confidence: 99%

Properties of epoxy resin matrix composites improved by silica sol‐activated hollow ceramic microspheres

Li,

Zhou,

Liu

et al. 2024

Polymer Composites

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Silica sol can activate the surface of hollow ceramic microspheres and improve the properties of composite materials by improving the interface between the microspheres and the epoxy resin. The group changes on the surface of microspheres were measured using infrared spectroscopy. The microspheres were observed with a scanning electron microscope. The density, water absorption, and mechanical properties of the materials were tested using scales and mechanical testing machines. The results showed that SiO2 and silane molecules were introduced on the surface of the microspheres after treatments. As the silica sol content increased, the slurry viscosity increased by 34.5%, the composite density increased by 5.8%, and the water absorption decreased by 35.8%. When the silica sol content was 25%, the flexural strength and compressive strength of the composites were 73.49 and 116.27 MPa, respectively, which were 37.8% and 23.6% higher than those of the untreated composites, and the mechanical properties became clearly improved. High mechanical properties enable the materials to be used in deeper ocean areas.Highlights Nanoparticles are introduced onto the surface of hollow microspheres. The activated microspheres can bind better to the silane coupling agent. Silane coupling agent assisted by silica sol improved interfacial bonding. Surface activation of microspheres improves the properties of composites.

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Section: Performance Testing and Characterization Methodsmentioning

confidence: 99%

Properties of epoxy resin matrix composites improved by silica sol‐activated hollow ceramic microspheres

Li,

Zhou,

Liu

et al. 2024

Polymer Composites

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show abstract

“…In contrast, the tail and tie free energy functions [31] can be employed to characterize the crystal phase as follows: (8) where k B = 1.38 × 10 −23 J K −1 is the Boltzmann constant, ξ represents the size of crystal phase, υ is the excluded volume, ℓ is the segment length, ℓ B is the Bjerrum length, Q is the charge density, κ is the inverse Debye length, m is the initial molar number of crystal phase, and n is the molar number of crystal phase dispersed into CANs.…”

Section: Constitutive Stress-strain Relationshipmentioning

confidence: 99%

“…reactions (BERs), bestow thermoset epoxy polymers with good capabilities of self-healing [1][2][3], reprocessing [4,5], and recycling [6,7]. Experimental results have revealed that the epoxy polymers with CANs can achieve excellently reversible mechanical properties [8,9], and, thus, have great practical applications in the fields, such as aerospace [10,11], manufacturing industry [12,13], and 3D printing [14,15].…”

Section: Introductionmentioning

confidence: 99%

A Hamiltonian graph model for the cooperative toughening of crystalline phases and covalent adaptable networks in semi-crystalline thermoset epoxy

Zhang

Elmarakbi

et al. 2023

Smart Mater. Struct.

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Attributed to its existence of bond exchange reactions (BERs) and covalent adaptable networks (CANs), thermoset epoxy has shown self-healing and reversibly mechanical capabilities. However, toughening mechanisms and cooperative coupling of these crystal phases and CANs in a semi-crystalline thermoset epoxy have not been well understood. In this study, a Hamiltonian graph model is formulated to explore toughening mechanisms in the semi-crystalline thermoset epoxy based on the vertices and paths, both of which are employed to describe the crystalline phases and CANs, respectively. A free-energy equation is further developed based on the tail and tie free energy functions to investigate the cooperative coupling of crystal phases and CANs. The crystal phases increase the cross-linking density of the CANs, which help the crystal phases with a homogeneous dispersion. Moreover, an extended Maxwell model is developed along with the Hamiltonian graph to explore the coupling effect of crystal phase and CAN on the mechanical behaviors of semi-crystalline thermoset epoxy. A constitutive stress-strain relationship is then proposed to describe the self-healing and toughening behaviors of semi-crystalline thermoset epoxy. The stress-strain relationship of semi-crystalline polymers, which incorporates the crystal phases and CANs, has been thoroughly investigated using the analytical results obtained from the proposed Hamiltonian graph model. Finally, effectiveness of the proposed model is verified using the finite element analysis and a set of experimental data.

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“…Mechanical properties such as Young’s modulus, flexural strength, and compressive strength under the standard curing of a polymer-cement composite fabricated by in situ polymerization within the cement matrix were evaluated [ 17 ]. The thickness of hybrid epoxy and acrylic polymer coating/nanoclay shows a significant influence on their mechanical properties and thermal stability [ 18 ]. The wettability of polymer/cement composites were investigated using the contact angle, as well as the adhesion strength and antibacterial activity [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Ameliorating the Mechanical Parameters, Thermal Stability, and Wettability of Acrylic Polymer by Cement Filling for High-Efficiency Waterproofing

et al. 2022

Self Cite

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Acrylic polymer/cement nanocomposites in dark and light colors have been developed for coating floors and swimming pools. This work aims to emphasize the effect of cement filling on the mechanical parameters, thermal stability, and wettability of acrylic polymer. The preparation was carried out using the casting method from acrylic polymer coating solution, which was added to cement nanoparticles (65 nm) with weight concentrations of (0, 1, 2, 4, and 8 wt%) to achieve high-quality specifications and good adhesion. Maximum impact strength and Hardness shore A were observed at cement ratios of 2 wt% and 4 wt%, respectively. Changing the filling ratio has a significant effect on the strain of the nanocomposites. The contact angle was increased as the concentration of additives and cement increased, indicating that the synthesized coating is not hydrophilic and does not allow water permeability through it. The results show that the acrylic polymer/cement with a cement ratio of 8 wt% is the best nanocomposite for high-efficiency waterproofing.

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Mechanical Characteristics and Thermal Stability of Hybrid Epoxy and Acrylic Polymer Coating/Nanoclay of Various Thicknesses

Cited by 26 publications

References 44 publications

Properties of epoxy resin matrix composites improved by silica sol‐activated hollow ceramic microspheres

Properties of epoxy resin matrix composites improved by silica sol‐activated hollow ceramic microspheres

A Hamiltonian graph model for the cooperative toughening of crystalline phases and covalent adaptable networks in semi-crystalline thermoset epoxy

Ameliorating the Mechanical Parameters, Thermal Stability, and Wettability of Acrylic Polymer by Cement Filling for High-Efficiency Waterproofing

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