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  • The article critically reviews the current methodologies for determination of apparent activation energy of structural relaxation, a dagger h*, in the glass transition range. Tool-Narayanaswamy-Moynihan phenomenological model was used to simulate data for all major types of relaxation behavior, which were consequently evaluated in terms of the tested methodologies (curve-fitting, evaluation of a dagger h* from intrinsic cycles and evaluation of a dagger h* from constant heating rate cycles). Advantages and disadvantages of particular methodologies are demonstrated and thoroughly discussed. In addition, effects of various data-distortive effects influencing determination of glass transition activation energy are demonstrated and described. The discussed data-distortive effects include presence thermal gradients, improperly designed temperature programs, incorrectly applied subtractions of the thermokinetic background, or inability of the DSC instrument to perform high cooling/heating rates. Detailed guide for correct determination of a dagger h* from DSC measurements is introduced.
  • The article critically reviews the current methodologies for determination of apparent activation energy of structural relaxation, a dagger h*, in the glass transition range. Tool-Narayanaswamy-Moynihan phenomenological model was used to simulate data for all major types of relaxation behavior, which were consequently evaluated in terms of the tested methodologies (curve-fitting, evaluation of a dagger h* from intrinsic cycles and evaluation of a dagger h* from constant heating rate cycles). Advantages and disadvantages of particular methodologies are demonstrated and thoroughly discussed. In addition, effects of various data-distortive effects influencing determination of glass transition activation energy are demonstrated and described. The discussed data-distortive effects include presence thermal gradients, improperly designed temperature programs, incorrectly applied subtractions of the thermokinetic background, or inability of the DSC instrument to perform high cooling/heating rates. Detailed guide for correct determination of a dagger h* from DSC measurements is introduced. (en)
Title
  • How to determine activation energy of glass transition
  • How to determine activation energy of glass transition (en)
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  • How to determine activation energy of glass transition
  • How to determine activation energy of glass transition (en)
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  • RIV/00216275:25310/14:39898712!RIV15-GA0-25310___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GAP106/11/1152)
http://linked.open...iv/cisloPeriodika
  • 3
http://linked.open...vai/riv/dodaniDat
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  • 19803
http://linked.open...ai/riv/idVysledku
  • RIV/00216275:25310/14:39898712
http://linked.open...riv/jazykVysledku
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  • Structural relaxation; TNM model; Activation energy; Glass transition (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [797FCACF03FB]
http://linked.open...i/riv/nazevZdroje
  • Journal of Thermal Analysis and Calorimetry
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http://linked.open...ichTvurcuVysledku
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http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 118
http://linked.open...iv/tvurceVysledku
  • Svoboda, Roman
http://linked.open...ain/vavai/riv/wos
  • 000344810300036
issn
  • 1388-6150
number of pages
http://bibframe.org/vocab/doi
  • 10.1007/s10973-014-4077-8
http://localhost/t...ganizacniJednotka
  • 25310
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