Thermal diffusivity of polymers by the laser flash technique

Santos, Wilson Nunes dos; Mummery, Paul; Wallwork, A. L.

doi:10.1016/j.polymertesting.2005.03.007

Cited by 156 publications

(61 citation statements)

References 7 publications

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“…Also the thermal loss parameter ℎ is of a reasonable magnitude [13]. Literature values for the thermal diffusivity for PVC scatter probably due to varying material batches, however, the value of 1.28 • 10 −7 m²/s obtained for PVC is close to those previously published [13,15]. Fig.3 (left) shows reconstructed thicknesses of polymers A to D in dependence of the reference thickness, obtained both in reflection and transmission geometry for 200 fits each.…”

Section: Calibrationsupporting

confidence: 78%

Thickness determination of semitransparent isolated solids using the flash method and an analytical model

Altenburg¹,

Weber²,

Krankenhagen³

2016

Proceedings of the 2016 International Conference on Quantitative InfraRed Thermography

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As groundwork for thickness determination of polymeric surface protection systems for concrete, we present a method for measuring the thickness of isolated semitransparent solids using pulse thermography both in transmission and reflection geometry. Since standard models [1] do not capture semitransparency, an advanced analytical model by Salazar et al.[2] is applied. Physical material parameters are deduced by fitting experimental data from samples of wellknown thickness. Using those, the thickness of samples of the material can be obtained by fitting, as demonstrated for different semitransparent polymer materials.

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Section: Calibrationsupporting

confidence: 78%

Thickness determination of semitransparent isolated solids using the flash method and an analytical model

Altenburg¹,

Weber²,

Krankenhagen³

2016

Proceedings of the 2016 International Conference on Quantitative InfraRed Thermography

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“…Among these, laser-flash thermal diffusivity measurement is widely used, being a relatively fast method, using small specimens (Nunes dos Santos, 2007), (Nunes dos Santos, 2005) and (Gaal et al, 2004). In this method, the sample surface is irradiated with a very short laser pulse and the temperature rise is measured on the opposite side of the specimen, permitting calculation of the thermal diffusivity of the material, after proper mathematical elaboration.…”

Section: Methods For Thermal Conductivity Measurementsmentioning

confidence: 99%

Thermal Conductivity of Nanoparticles Filled Polymers

Ebadi‐Dehaghani¹,

Nazempour²

2012

Smart Nanoparticles Technology

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“…In the laser flash method, a heat pulse of short duration is incident on the front side of the sample, and the increase in the temperature of the sample is recorded on the back side. Thermal diffusivity is calculated using the half maximum temperature, dimension of sample, and the half time [18–20]. …”

Section: Introductionmentioning

confidence: 99%

Thermally conductive polyamide 6/carbon filler composites based on a hybrid filler system

Kim

et al. 2015

Science and Technology of Advanced Materials

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We explored the use of a hybrid filler consisting of graphite nanoplatelets (GNPs) and single walled carbon nanotubes (SWCNTs) in a polyamide 6 (PA 6) matrix. The composites containing PA 6, powdered GNP, and SWCNT were melt-processed and the effect of filler content in the single filler and hybrid filler systems on the thermal conductivity of the composites was examined. The thermal diffusivities of the composites were measured by the standard laser flash method. Composites containing the hybrid filler system showed enhanced thermal conductivity with values as high as 8.8 W (m · K)−1, which is a 35-fold increase compared to the thermal conductivity of pure PA 6. Thermographic images of heat conduction and heat release behaviors were consistent with the thermal conductivity results, and showed rapid temperature jumps and drops, respectively, for the composites. A composite model based on the Lewis–Nielsen theory was developed to treat GNP and SWCNT as two separate types of fillers. Two approaches, the additive and multiplicative approaches, give rather good quantitative agreement between the predicted values of thermal conductivity and those measured experimentally.

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Thermal diffusivity of polymers by the laser flash technique

Cited by 156 publications

References 7 publications

Thickness determination of semitransparent isolated solids using the flash method and an analytical model

Thickness determination of semitransparent isolated solids using the flash method and an analytical model

Thermal Conductivity of Nanoparticles Filled Polymers

Thermally conductive polyamide 6/carbon filler composites based on a hybrid filler system

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