The effects of experimental parameters in the thermal diffusivity measurements of oriented polymer films using mirage effect: Computer simulation

1992 ◽  
Vol 55 (6) ◽  
pp. 586-595 ◽  
Author(s):  
J. Rantala ◽  
J. Jaarinen ◽  
P. K. Kuo
Keyword(s):  
Computer Simulation ◽  
Thermal Diffusivity ◽  
Polymer Films ◽  
Oriented Polymer ◽  
Mirage Effect ◽  
Diffusivity Measurements ◽  
Experimental Parameters

A pulsed method for thermal-diffusivity measurements of polymer films with submicrometre thickness

1986 ◽  
Vol 64 (9) ◽  
pp. 1200-1203 ◽  
Author(s):  
H. Coufal ◽  
P. Hefferle
Keyword(s):  
Thin Films ◽  
Thermal Diffusivity ◽  
Laser Pulse ◽  
Heat Source ◽  
Polymer Films ◽  
Heat Pulse ◽  
Diffusivity Measurements ◽  
Pulsed Measurements

The use of pyroelectric calorimeters for pulsed measurements of the thermal diffusivity of thin films is described. The material under study is directly coated on to a pyroelectric calorimeter. A transient heat source is generated at the surface of the sample via absorption of a laser pulse. By analysis of the transmitted heat pulse, the thermal diffusivity of the sample can be determined. The potentials of this method are demonstrated on polymer films with thicknesses in the submicrometre range.

Frequency-resolved thermal lensing: An approach for thermal diffusivity measurements in liquid samples

2015 ◽  
Vol 24 (03) ◽  
pp. 1550032 ◽  
Author(s):  
Luis G. Rodriguez ◽  
J. L. Paz ◽  
César Costa Vera
Keyword(s):  
Thermal Diffusivity ◽  
Theoretical Model ◽  
Fresnel Diffraction ◽  
Thermal Lensing ◽  
Thermal Waves ◽  
Liquid Samples ◽  
Diffusivity Measurements ◽  
Experimental Parameters ◽  
Theoretical Predictions

Frequency-resolved thermal lensing (FRTL) is an approach used to measure thermal diffusivity coefficients of liquid samples. The theoretical model of this approach is based on thermal waves and the Fresnel diffraction approximation. This model predicts that only two experimental parameters are needed to estimate the thermal diffusivity of the sample. Experiments performed on pure solvents validate the theoretical predictions and confirm the feasibility of using this approach to thermally characterize liquid samples. The results show that the method is a simple and sensitive approach to determine thermal diffusivity coefficients in liquid samples.

Polarized spectra of aromatic molecules in oriented polymer films

1980 ◽  
Vol 32 (5) ◽  
pp. 487-491
Author(s):  
V. Yu. Azarov ◽  
R. N. Nurmukhametov
Keyword(s):  
Polymer Films ◽  
Oriented Polymer ◽  
Aromatic Molecules

Computer simulation of the fracture of perfectly oriented polymer fibres

Polymer ◽  
1997 ◽  
Vol 38 (7) ◽  
pp. 1669-1676 ◽  
Author(s):  
Tsunetoshi Matsuda ◽  
Kazuo Tai
Keyword(s):  
Computer Simulation ◽  
Oriented Polymer

Circularly polarized luminescence from oriented polymer films doped with a tetraphenylethylene-based conjugated oligomer

2021 ◽  
Author(s):  
Wan Zhang ◽  
Baining Ni ◽  
Hongkun Li ◽  
Yonggang Yang ◽  
Yongfang Li ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Polymer Films ◽  
High Quantum Yield ◽  
Oriented Polymer ◽  
Active Materials ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Potential Applications ◽  
Wide Potential

Circularly polarized luminescence (CPL) materials have attracted increasing interest due to their wide potential applications. However, achieving CPL-active materials with both large dissymmetry factor (glum) and high quantum yield (F)...

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