Aimed at the widespread concrete durability deterioration problem among old irrigation aqueducts in China, the main purpose of this study is to propose two dynamic elastic modulus (({E}_{d})) targeted concrete quality evaluation methods as major supplements to the conventional inspection approaches mainly based on testing …
Learn MoreThe effects of different preparation methods on the surface morphology and roughness of membranes were analyzed by the photographs, SEM, AFM, and CA and shown in Figure 2. Compared with the ...
Learn MoreIntroduction: The aim of this study was to systemically investigate the potential of Galla chinensis extract (GCE) to interact with the dentin matrix to improve its biochemical and biomechanical properties and structural stability. Methods: The fully demineralized dentin matrices were prepared and biomodified by 0.4% and 4% GCE solutions, with 5% …
Learn MorePlastomers provide several advantages and are commonly acknowledged to improve high-temperature stiffness, although some of them are more prone to phase separation and consequent storage instability. Nowadays, due to the recent push for recycling, many road authorities are looking at the use of recycled plastics in roads.
Learn More2.3.1. The Elastic/Storage Modulus (G′) The elastic modulus is a measure of the energy stored in a material, in which shear deformation has been imposed. In other words, elastic modulus can be thought of as that proportion of the total rigidity (the complex modulus) of a material that is attributable to elastic deformation.
Learn MoreWe can then get the generalized complex modulus, by analytically extending: i.e.
Learn MoreAs expected, the incorporation of ABS within PLA results in a decrease of the storage modulus of the blend at 20°C from 3.9 GPa to 3.2 GPa due the relatively low storage modulus of ABS (1.8 GPa ...
Learn MoreMany methods such as improving cross-linking [18,19,20,21], or crystallinity percentage [22,23,24,25] through irradiation ... Khashoggi blended UHMWPE with HDPE and found that the viscosity, storage modulus, and loss modulus were decreased by The ...
Learn MoreThe methods for improving the interlaminar mechanical properties of thermoplastic composites are reviewed in this work from two perspectives: enhancing the interface properties between fiber and resin and the properties of the interlaminar resin-rich zone. ... The room temperature storage modulus and absorbed impact energy of the …
Learn MoreSurface hardening has been well applied in hydrophobic surfaces to improve their durability. Garcia-Giron et al. applied a low-temperature plasma surface alloying method to improve steel surface hardness from 172 to 305 HV. Laser processing was then adopted for the fabrication of channel-like textures with superhydrophobicity.
Learn MorePregelatinized starch (PGS) is often used to improve the processing quality of foodstuffs, but little attention has been paid to the effects of different reheating methods and degree of starch gelatinization (DSG) on their rheological and textural properties. In this study, pregelatinized rice starc …
Learn MoreStorage modulus is the indication of the ability to store energy elastically and forces the abrasive particles radially (normal force). At a very low frequency, the rate of shear is very low, hence for low frequency the capacity of retaining the original strength of media is high. As the frequency increases the rate of shear also increases ...
Learn MoreThe ratio of loss modulus to storage modulus (G′/G″) gives tan δ (δ is the phase lag between stress and strain). The incorporation of NFs significantly impacts the …
Learn MoreAmong the methods tested in this study, AFM, parallel-plate rheometry, and OS all provide measurements of Young''s modulus (E), whereas MTC, CMR, and …
Learn Morelation methods. The elastic modulus E of The unloading stiffness method, which uses the unloading slope, proposed by Sneddon-Pharr-Olive [9, 10] (or Hertz [11]), is widely used to calculate the ...
Learn MoreThe modulus of a cell—a measure of its viscoelastic properties—is a key factor in how cells sense these forces and interact with other cells and the extracellular matrix. In this study, we ...
Learn MoreThe modulus of CNC varies considerably between 50-200 GPa, based on the methods used to measure the tensile properties, types of cellulose (cellulose I or II) and the ratio between two celluloses. In the current study, a value of 145 GPa for CNC (E f ) was used for theoretical modeling [ Citation 22 ].
Learn MoreOne of the most widely used models is the MacKintosh model [40, 41], which considers biopolymer filamentous structures as worm-like chains, with a stretching …
Learn MoreAmong all investigated modification methods, ... In order to further improve the storage stability of EVA-modified bitumen, some stabilizing agents were introduced with EVA, which helped enhancing the overall characteristics of binder. ... and nature of the polymer have a significant effect on storage modulus and loss modulus of …
Learn MoreDue to storage stability drawbacks of polymer-modified bitumen (PMB), this study investigated the storage stability and physicochemical performance of Styrene-Butadiene-Styrene (SBS) asphalt binders (herein PMB) modified with Silicone surface-treated nanosilica (SNS). Dosages 0% (control), 1.5%, 3% and 5% SNS powder …
Learn MoreThe changes in the storage modulus, loss modulus and damping factor of pristine membranes and MMMs as a function of temperature determined from DMA testing are shown in Figure 6.
Learn Moref, g Storage modulus (f) and mechanical loss (Tan δ m) (g) as a function of temperature of VHB TM 4910 and BAC2 before and after swollen. h The cyclic stress–strain curves of VHB TM 4910 and ...
Learn MoreOverall, both hydrogels demonstrate shear-thinning abilities and a change in loss and storage modulus at different strain; however, the 5% hydrogel has overall lower viscosity, storage, and loss moduli compared to the 7.5% hydrogel, which leads to a …
Learn MoreThe following paper presents an overview of methods for improving the storage stability at high temperature of rubber modified bitumen. The storage stability of the rubber modified bitumen can be improved by using a various types of modifiers that form the bonds between the components of these binders.
Learn MoreDynamic mechanical analysis is an essential analytical technique for determining the viscoelastic properties of polymers. Unlike many comparable methods, DMA can provide information on major and minor transitions of materials; it is also more sensitive to changes after the glass transition temperature of polymers.
Learn MoreOne of the most widely used models is the MacKintosh model [40,41], which considers biopolymer filamentous structures as worm-like chains, with a stretching …
Learn MoreSimilarly, for deformations resulting from shear forces, the shear storage modulus (G′) and the shear loss modulus (G″) 14 are frequently evaluated by rheology …
Learn MoreThe cross-linking reaction of the pre-reserved reactive groups was used to enhance the storage modulus; however, it embrittled the polymer. Yu et al. used …
Learn More» Tan Delta (Tan δ) is simply a ratio between the two, loss/storage, or E''''/E'' Typical viscoelastic properties include the following parameters: » (E'') The storage modulus is the elastic component and describes the sample''s stiffness » (E'''') The loss modulus is the viscous component and is related to the sample''s
Learn MoreObjective: The objective was to develop a new tissue conditioner using acetyl tributyl citrate (ATBC), tributyl citrate (TBC), and a novel hyperbranched polyester (TAH) with long-term stable viscoelasticity. Methods: Plasticizers, i.e., ATBC, TBC, TAH (number-average molecular weight, 1306 g/mol; weight-average molecular weight, 4245 g/mol), butyl …
Learn MoreThe tensile strength and elastic modulus was found to increase with clay content (up to 1.6 MPa and 43.2 MPa respectively).The elongation was decreased although it was still 740% at maximum clay content of 23.2 wt% at which the highest tensile strength and elastic modulus was achieved. The excellent mechanical properties were …
Learn MoreThe addition of fly ash increases the storage modulus of the medium, which can be attributed to the better interfacial adhesion between fly ash and other components of the …
Learn MoreOne of the most widely used models is the MacKintosh model [40, 41], which considers biopolymer filamentous structures as worm-like chains, with a stretching modulus, μ, and bending modulus, κ. The storage modulus is predicted to scale as G′ ∼ κ 7/5 (c′·l) 11/5, where κ is the bending modulus, c′ the concentration of filaments, and l the contour …
Learn MoreThe responsive stress-gaining effect on the mechanical properties via dynamic molecular locking strategy in our study is unprecedented, with an increase in the elastic modulus and tensile strength by three and one order of magnitude, respectively. The stress-gaining concept represents a paradigm in material design.
Learn Moreelastic or storage modulus (G'' or E'') of a material, defined as the ratio of the elastic (in-phase) stress to strain. The storage modulus relates to the material''s ability to store energy elastically. Similarly, the loss modulus (G" or E") of a material is the ratio of the
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