User:Douglas M. Fox/Notebook/AU CHEM-571 F2011 Lab Support/2011/08/26

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Project 1: Zein Film Properties Main project page
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Project Objective

Measure properties of a zein film sample

  • Thermal properties using DSC
  • Viscoelastic properties using DMA
  • Crystalline properties using XRD

Today's Task

Calibrate DSC

  • Change cooling unit from liquid nitrogen system (LNCS, -180C) to refrigerated system (RCS, -80C)
  • Condition cell to remove water
  • Change purge gas from He to N2
  • Run heat/cool cycle
  • Determine cell constant (heat flow calibration)
  • Measure melting point of Indium (temperature calibration)
  • Measure sapphire heat capacity (baseline calibration)


  • Cell interior was tarnished due to oxidation & off-gassing of product decomposition
  • Cleaned silver furnace using supplied glass fiber brush
  • RCS successfully connected
  • Due to impending hurricane & potential power outage, overnight run canceled
  • Calibrations postponed until next week