Results 271 to 280 of about 1,274,604 (303)

Time–temperature superposition of the dynamic birefringence of polyethylene

Journal of Polymer Science Part A-2: Polymer Physics, 1967
AbstractThe dynamic strain‐optical coefficient of low‐density polyethylene is found to decrease with increasing frequency and increase with increasing temperature (at temperatures up to 60°C.). It is found that a series of curves representing the real, K′, and imaginary, K″, parts of the frequency variation of the strain‐optical coefficient obtained at
A. Takeuchi, R. S. Stein
openaire   +1 more source

Time-Temperature-Pressure Superposition in Polymer Thickened Liquid Lubricants

Journal of Tribology, 2014
Shear-dependent viscosities have been measured over a range of temperature and pressure for seven engine oils blended to have kinematic viscosity of 14 mm2/s at 100 °C with two base oils and four viscosity modifiers. Elevated pressure measurements were performed with a pressurized thin-film Couette viscometer and ambient pressure measurements were done
Scott Bair, Farrukh Qureshi
openaire   +1 more source

A novel method for determining the time-temperature superposition relationship of SBS modified bitumen: Effects of bitumen source, modifier type and aging

, 2021
Zihao Chen, Henglong Zhang, Xinqi Liu, H. Duan   +3 more
semanticscholar   +1 more source

Validation of partial time-temperature superposition principle in thermorheologically complex asphalts

, 2021
Noe Hernandez-Fernandez, A. Ossa-Lopez
semanticscholar   +1 more source

Time‐temperature superposition and physical aging in amorphous polymers

Polymer Engineering & Science, 1988
AbstractIn the past, time‐temperature superposition has been used to extend the time scale of creep tests in polymers from the short times easily obtained in the laboratory to long times seen in actual use. A fundamental assumption of time‐temperature superposition is, however, that the polymer does not change in structure as a function of time ...
openaire   +1 more source

Time‐temperature superposition for polypropylene

Journal of Polymer Science Part B: Polymer Letters, 1964
R. C. Laible, R. Meredith
openaire   +1 more source

Optimization of Test Parameters for Time-Temperature Superposition Testing and Effect of Heat History on Time-Temperature Superposition Results

2023 Fall Technical Meeting of the Rubber Division, American Chemical Society, 2023
Jonathan Martens, Kaylan Yaceczko
openaire   +1 more source

Time-temperature superposition and relaxational behavior in polymeric glasses

Journal of Macromolecular Science, Part B, 1968
It is shown that a free-volume treatment of the relaxational behavior of a polymer can be extended into the glassy region.
openaire   +1 more source

Prediction of polyurethane behaviour via time-temperature superposition: Meanings and limitations

, 2020
D. Ionita, M. Cristea, C. Găină
semanticscholar   +1 more source

Application of time-temperature superposition principle to pull-off tensile strength of asphalt tack coats

Construction and Building Materials, 2020
Nithin Sudarsanan, B. Fonte, Y. Kim
semanticscholar   +1 more source