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Thermal Analysis

LABORATORIUM MIPA TERPADU FMIPA UNS. Thermal Analysis. Thermal Analysis. Differential Scanning Calorimetry (DSC) Thermogravimetric Analysis (TGA) Diferential Thermal Analysis (DTA). Basic Principle. Sample is heated at a constant heating rate Sample’s Property Measured Wt TGA

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Thermal Analysis

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  1. LABORATORIUM MIPA TERPADU FMIPA UNS Thermal Analysis

  2. Thermal Analysis • Differential Scanning Calorimetry (DSC) • Thermogravimetric Analysis (TGA) • Diferential Thermal Analysis (DTA)

  3. Basic Principle • Sample is heated at a constant heating rate • Sample’s Property Measured • Wt TGA • Heat Flow DSC • Temp DTA

  4. Thermal Analysis Thermogravimetric Analysis (TGA) TGA measures the weight of a substance heated at a controlled rate as a function of temperature or time. All materials ultimately decompose on heating, and the decomposition temperature and profile is a characteristic property of each material. • Main use of TGA: Inorganic Content of Material

  5. Thermal Analysis Thermogravimetric Analysis (TGA) • Other uses of TGA: • Material Thermal Stability. • Moisture and Volatiles Content (TG-IR). • Composition of Multi-Component Systems. • Shelf-Life Studies and Decomposition Kinetics.

  6. Thermal Analysis Thermogravimetric Analysis (TGA) % Polymer = 64.4% % Carbon Black = 3.4% % Glass Fibre = 32.2%

  7. TGA • Constant Heating Rate • Initial Temp • Final Temp • Heating Rate (°C/min) • Data • Weight vs Time • Weight vs Temp. • Differential This Data (DTG)

  8. TGA – Ca(C204)*xH2O

  9. DTA • Sample and Reference Placed in Heater • Constant Heating Rate • Initial Temp • Final Temp • Heating Rate (°C/min) • Data • Temp of Sample vs Time (or Temp) • Temp of Reference vs Time (or Temp) • Reference should be inert, e.g. nothing but latent heat • Measures • Heat of crystallization • Glass Transition Temperature

  10. DTA + DTG

  11. Thermal Analysis Differential Scanning Calorimetry (DSC) DSC is a thermal method of analysis to study the thermal behaviour and thermal properties of materials (typically polymers). The material is sealed in a sample pan and subjected to a controlled temperature programme. The resulting thermograph can yield much valuable information about the properties of the material analysed. • Main use of DSC: Material Identification (Tm and DHf) based on IS EN ISO 3146:2000; Method C2

  12. Thermal Analysis Differential Scanning Calorimetry (DSC)

  13. DSC

  14. DSC • Constant Heating Rate • Initial Temp • Final Temp • Heating Rate (°C/min) • Data • Heat flow to sample minus Heat flow to reference vs Time (Temp.) • Measures heat of crystallization Polymer without weight change in this temperature range

  15. Thermal Analysis Differential Scanning Calorimetry (DSC) • Other uses of DSC: • % Crystallinity determination by DSC (based on IS EN ISO 3146:2000; Method C2). • Purity and Polymorphism analysis by DSC. • Thermal Stability of materials (e.g. – oxidative induction time (OiT) of materials) by DSC.

  16. Thermal Analysis Differential Scanning Calorimetry (DSC)

  17. Contact Details : Laboratorium MIPA Terpadu FMIPA UNS Jln Ir. Sutami 36A Kentingan Surakarta Phone/Fax 0271 663375 Cq. Dr. Sayekti Wahyuningsih, M.Si Edi Pramono, M.Si

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