Methodology for DSC calibration in high heating rates

被引:19
作者
Braga, Carlos Isidoro [1 ]
Rezende, Mirabel Cerqueira [2 ]
Costa, Michelle Leali [3 ]
机构
[1] Inst Tecnol Aeronaut, Sao Jose Dos Campos, SP, Brazil
[2] Inst Aeronaut & Espaco, Sao Jose Dos Campos, SP, Brazil
[3] Sao Paulo State Univ, Guaratingueta, SP, Brazil
关键词
DSC; High heating rate; Calibration; Thermal analysis; Polymers;
D O I
10.5028/jatm.2011.03021911
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
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 20 degrees C. min(-1), sample mass from 10 to 15 mg and standard aluminum sample pan weighting, approximately, 27 mg. 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 0.570 mg to 20.9 mg were analyzed in multiples sample heating rate from 4 to 324 degrees C. 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.
引用
收藏
页码:179 / 191
页数:13
相关论文
共 34 条
  • [1] [Anonymous], 2008, E967 ASTM
  • [2] [Anonymous], 2008, E928 ASTM
  • [3] [Anonymous], 2008, D341808 ASTM
  • [4] [Anonymous], 1990, THERMAL ANAL
  • [5] Association Standards Testing Materials, 2008, E968 ASTM
  • [6] ASTM, 2006, E794 ASTM
  • [7] ASTM,, 2006, E793 ASTM
  • [8] Braga C. I., 2009, THESIS
  • [9] Canevarolo Jr S. V., 2004, TECNICAS CARACTERIZA, P209
  • [10] Canevarolo Jr S. V., 2002, CIENCIA POLMEROS