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Journal of Aerospace Technology and Management

versão impressa ISSN 1984-9648versão On-line ISSN 2175-9146

J. Aerosp. Technol. Manag. vol.3 no.2 São José dos Campos mai./ago. 2011

https://doi.org/10.5028/jatm.2011.03021911 

ORIGINAL PAPERS

Methodology for DSC calibration in high heating rates

Carlos Isidoro Braga1 

Mirabel Cerqueira Rezende2 

Michelle Leali Costa*  3 

1Instituto Tecnológico de Aeronáutica. São José dos Campos/SP - Brazil. braga@srgrupo.com.br

2Instituto de Aeronáutica e Espaço. São José dos Campos/SP - Brazil. mirabelmcr@iae.cta.br

3São Paulo State University. Guaratinguetá/SP - Brazil. michelle@fastline.com.br


Abstract

Despite the large use of differential scanning calorimetry (DSC) technique in advanced polymer materials characterization, the new methodology called DSC in high heating rates was developed. The heating rate during conventional DSC experiments varying from 10 to 20ºC.min-1, sample mass from 10 to 15mg and standard aluminum sample pan weighting, approximately, 27mg. In order to contribute to a better comprehension of DSC behavior in different heating rates, this work correlates as high heating rate influences to the thermal events in DSC experiments. Samples of metallic standard (In, Pb, Sn and Zn) with masses varying from 0.570mg to 20.9mg were analyzed in multiples sample heating rate from 4 to 324ºC. min-1. In order to make properly all those experiments, a precise and careful temperature and enthalpy calibrations were performed and deeply discussed. Thus, this work shows a DSC methodology able to generate good and reliable results on experiments under any researcher choice heating rates to characterize the advanced materials used, for example, for aerospace industry. Also it helps the DSC users to find in their available instruments, already installed, a better and more accurate DSC test results, improving in just one shot the analysis sensitivity and resolution. Polypropylene melting and enthalpy thermal events are also studied using both the conventional DSC method and high heating rate method.

Keywords: DSC; High heating rate; Calibration; Thermal analysis; Polymers

Full text is available only in PDF.

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Received: May 16, 2011; Accepted: July 04, 2011

*author for correspondence

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