Book•
Mechanical Properties of Polymers and Composites
14 Dec 1993-
TL;DR: In this article, the authors discuss various mechanical properties of fiber-filled composites, such as elastic moduli, creep and stress relaxation, and other mechanical properties such as stress-strain behavior and strength.
Abstract: Mechanical Tests and Polymer Transitions * Elastic Moduli * Creep and Stress Relaxation * Dynamical Mechanical Properties * Stress-Strain Behaviour and Strength * Other mechanical Properties * Particulate-Filled Polymers * Fiber- Filled Composites and Other Composites.
Citations
More filters
TL;DR: In this article, the level and effect of CNC modification are evaluated using Fourier transform infrared (FTIR), elemental analysis (EA), thermal analysis, contact angle measurements, and solvent dispersibility studies.
91 citations
TL;DR: In this paper, the effect of stearic acid modification on the dispersability of silica nanoparticles and the adhesion between the filler and polymer matrix was investigated, and it was shown that the wettability of the particles was improved by the addition of Stearic Acid.
Abstract: The effect of stearic acid modification on the dispersity of silica nanoparticles and the adhesion between the filler and polymer matrix with stearic acid concentration were investigated. The wettability of silica nanoparticles was improved by the addition of stearic acid. The presence of adsorbed stearic acid on the surface of the silica nanopar- ticles reduced the interaction between silica nanoparticles, and reduced the size of agglomerates with increasing con- centration. Silica nanoparticle-reinforced poly(ethylene 2,6- naphthalate) (PEN) composites were melt-blended to inves- tigate their mechanical properties and the processability of the composites. The torque and total torque values of the composites decreased with increasing silica nanoparticle content. The tensile moduli of the composites reinforced with unmodified silica nanoparticles increased with increas- ing silica content, whereas the tensile strength and elonga- tion decreased. However, the stearic acid-modified silica nanoparticle-reinforced PEN composites exhibited in- creased elongation and decreased tensile moduli with in- creasing content because stearic acid, which adsorbs onto the surface of the silica nanoparticles in layers thicker than a monolayer, acts as a plasticizer during the melt-compound- ing stage. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 812- 818, 2004
91 citations
TL;DR: In this paper, the long-term creep behaviors of a neat epoxy resin and a commercial structural adhesive for bonding aluminum substrates were investigated, and the time-temperature superposition method produced a master curve, allowing for the longterm creep compliance to be estimated.
91 citations
TL;DR: In this article, the authors proposed a model that allows estimation of stiffening effects based on primary binder and filler properties, based on a conceptual model provided in an earlier publication for understanding the mechanism by which the filler stiffens the asphalt mastic.
Abstract: Many studies have focused on modelling the stiffening effect of mineral filler on asphalt binder. However, the interaction between both constituents was always a challenge to address. Current European as well as North American specifications includes limits on stiffening effects of fillers that are mostly empirically driven and hard to include in a mixture design process. This study offers a model that allows estimation of stiffening effects based on primary binder and filler properties. This study builds on a conceptual model provided in an earlier publication for understanding the mechanism by which the filler stiffens the asphalt mastic. The model hypothesizes that change of mastic complex modulus with filler content follows two phases; a diluted phase and a concentrated phase. In the diluted phase, the stiffening effect of the filler on the binder follows a linear filling trend where interaction between filler and binder is minimal. On the other hand the effect of the filler departs from the ...
91 citations
TL;DR: In this paper, the feasibility of improving polymer composites was investigated using 30 nm SiC nanoparticles in a vinyl ester resin, and the use of a dispersant, methacryloxy propyl trimethoxy silane (MPS), improved the dispersion quality and hence composite strength.
Abstract: The feasibility of improving polymer composites was investigated using 30 nm SiC nanoparticles in a vinyl ester resin. Even when the particle loading was less than 4% by weight, the viscosity of the nanoparticle suspension was found to increase much higher than that of microparticle suspension. This phenomenon may be the result of association between nanoparticles and polymer molecules, effectively making the nanoparticles larger. The resulting reduction in the mobility of polymer molecules also led to delayed curing. Ultrasonic mixing did not fully disperse the particles. As a result, the composite strength did not improve although the modulus increased. The use of a dispersant, methacryloxy propyl trimethoxy silane (MPS), improved the dispersion quality and hence the composite strength. The paper discusses the issues involved with processing, characterization and properties of SiC/vinyl ester nanocomposites. Methods of improving the nanocomposite quality are proposed in the paper as well.
90 citations
Cites background from "Mechanical Properties of Polymers a..."
...A change in the nature of the interface and dispersion quality at constant volume fraction does not have a significant influence on the modulus, but is essential in determining both the strength and toughness of the composite [18, 19]....
[...]