The behaviour of the thermal effusivity squared over the glass transition in polystyrene is measured over a considerable frequency range using a novel dual beam front detection photopyroelectric configuration, which ensures a very effective processing of the obtained signal. This has enabled the detection of the very small changes taking place in such a parameter, despite the non-favourable sensitivity conditions due to the large mismatch between the thermal effusivities of the pyroelectric transducer and of the sample. The effect of the thermal contact resistance between the sample and the pyroelectric detector is also considered and discussed.

Paoloni, S., Zammit, U., Marinelli, M., Mercuri, F., Pizzoferrato, R. (2013). Dual beam differential photopyroelectric setup for broadband thermal effusivity investigation of glass transitions in polymers. REVIEW OF SCIENTIFIC INSTRUMENTS, 84, 054904-054904-- [10.1063/1.4807155].

Dual beam differential photopyroelectric setup for broadband thermal effusivity investigation of glass transitions in polymers

PAOLONI, STEFANO;ZAMMIT, UGO;MARINELLI, MASSIMO;MERCURI, FULVIO;PIZZOFERRATO, ROBERTO
2013-01-01

Abstract

The behaviour of the thermal effusivity squared over the glass transition in polystyrene is measured over a considerable frequency range using a novel dual beam front detection photopyroelectric configuration, which ensures a very effective processing of the obtained signal. This has enabled the detection of the very small changes taking place in such a parameter, despite the non-favourable sensitivity conditions due to the large mismatch between the thermal effusivities of the pyroelectric transducer and of the sample. The effect of the thermal contact resistance between the sample and the pyroelectric detector is also considered and discussed.
2013
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/07 - FISICA APPLICATA (A BENI CULTURALI, AMBIENTALI, BIOLOGIA E MEDICINA)
English
Con Impact Factor ISI
glass transition; thermal effusivity; photopyroelectric
Paoloni, S., Zammit, U., Marinelli, M., Mercuri, F., Pizzoferrato, R. (2013). Dual beam differential photopyroelectric setup for broadband thermal effusivity investigation of glass transitions in polymers. REVIEW OF SCIENTIFIC INSTRUMENTS, 84, 054904-054904-- [10.1063/1.4807155].
Paoloni, S; Zammit, U; Marinelli, M; Mercuri, F; Pizzoferrato, R
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/76896
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