Results 271 to 280 of about 98,472 (317)

Application of time–temperature superposition principle to polymer transition kinetics

Journal of Applied Polymer Science, 2005
AbstractThe time–temperature equivalence equation is deduced simply in view of the transition kinetics of a polymer. The independent variables time and temperature are separated in the two sides of the resulting equation. Thus, a physical property of the polymer, which is temperature dependent, can be matched with the theoretical calculated curve from ...
Hu Yang, Rongshi Cheng, Rongshi Cheng
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Time‐temperature superposition principle applicability for blends formed of immiscible polymers

Polymer Engineering & Science, 2002
AbstractIn this work, the linear viscoelastic behavior of PP/PS and PP/HDPE blends modified with SEBS and EPDM, respectively, was studied. Small amplitude oscillatory shear measurements were carried out at different temperatures, ranging from 190°C to 240°C.
Nicole R. Demarquette, Paulo Henrique Pierin Macaúbas   +1 more
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Molecular simulations of asphalt rheology: Application of time–temperature superposition principle

Journal of Rheology, 2018
We show that the several decades gap between the time scales of experiments and atomistic simulations can be significantly reduced by applying time-temperature superposition (TTS) to the simulation results for various rheological properties of asphalt. Molecular dynamics simulations with atomistically detailed models were performed to characterize the ...
Fardin Khabaz, Rajesh Khare
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Time Temperature Superposition Principle Validation for Bituminous Mixes in the Linear and Nonlinear Domains [PDF]

Journal of Materials in Civil Engineering, 2013
AbstractThe mechanical behavior of bituminous mixes is very complex. It is also characterized by great thermal sensitivity. In the small strain domain (for strain amplitudes below approximately 10−4), it can be considered to be linear, therefore the linear viscoelasticity theory can be applied. In addition, the time temperature superposition principle (
Quang Tuan Nguyen, Nouffou Tapsoba, Hervé Di Benedetto, Cédric Sauzéat   +3 more
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On the Time‐Temperature Superposition Principle of Dilute Polymer Liquids

Journal of Rheology, 1979
In this work, a simple bead‐spring (dumbbell) model is employed together with the Langevin analysis to show that the master curves for stress must be made in terms of the group S/ρT, and S is the stress tensor, T the absolute temperature, and ρ the density of the solvent.
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Time-Temperature Superposition Principle Applied to Thermally Aged Composite Propellant

51st AIAA/SAE/ASEE Joint Propulsion Conference, 2015
Aging of solid propellant is always a matter of concern, especially when the formulation is known to be sensitive to chemical degradation. In this study a propellant formulation containing an aziridine-type bonding agent and prone to hydrolysis was submitted to accelerated aging, to evaluate its possible effect on important events that may occur during
Luciene Dias Villar, Luis Claudio Rezende   +1 more
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Extended creep behavior of dental composites using time–temperature superposition principle

Dental Materials, 2003
The purpose of the study was to characterize long-term creep deformation behavior of selected dental composite resins.Two hybrid composite resins (one midifill type Clearfill and the other minifill type Charisma) and one microfill type (Durafill) were evaluated.
Zena Cherian, Tritala K. Vaidyanathan, Jayalakshmi Vaidyanathan   +2 more
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Applicability of time temperature superposition principle to an immiscible blend of polyphenyleneoxide and polyamide

Journal of Polymer Engineering, 2011
Abstract The immiscible blend of polyphenyleneoxide (PPO) and polyamide (PA) is used in several applications exposed to high temperature. The complexity of numerical modeling of such materials is dependent on their thermorheological behavior with significant simplification possibilities, if the material is found to follow the time ...
Somasekhar Bobba, Roshan Jha, Narendra Anand Hardikar   +2 more
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Prediction of color changes in acetaminophen solution using the time–temperature superposition principle

Drug Development and Industrial Pharmacy, 2015
A prediction method for color changes based on the time-temperature superposition principle (TTSP) was developed for acetaminophen solution. Color changes of acetaminophen solution are caused by the degradation of acetaminophen, such as hydrolysis and oxidation. In principle, the TTSP can be applied to only thermal aging.
Kozo Takayama, Koji Mochizuki
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Time–temperature superposition principle for interlayer shear strength of bituminous pavements

Road Materials and Pavement Design, 2017
Poor interlayer bonding leads to a reduction in service life of bituminous pavements, thus the identification and measurement of the parameters affecting interlayer shear strength (ISS) are becomin...
Francesco Canestrari, Andrea Graziani, Fabrizio Cardone, Gilda Ferrotti   +3 more
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