User:Alicia Rasines Mazo/Notebook/CHEM-581 Experimental Chemistry I/2014/09/10: Difference between revisions

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** Bottom curve inflection point: 68.50 ºC<br.>
** Bottom curve inflection point: 68.50 ºC<br.>
'''PVA-Clay film in 200 ppm MG solution'''<br.>
'''PVA-Clay film in 200 ppm MG solution'''<br.>
#* Onset of water evaporation: 99.70ºC  
[[Image:PVACLay200ppm.png]]<br.>
#* Heat of hydrate decomposition: 1138 J/g
* Onset of water evaporation: 99.70ºC  
#* Mass of water evaporated = 0.00177 g
* Heat of hydrate decomposition: 1138 J/g
#* Major peaks in water:
* Mass of water evaporated = 0.00177 g
#** Minimum at 108ºC, other peaks at 110, 131ºC
* Major peaks in water:
#* Glass transition:
** Minimum at 108ºC, other peaks at 110, 131ºC
#** Top curve inflection point: 68.54ºC
* Glass transition:
#** Bottom curve inflection point: 67.97 ºC
** Top curve inflection point: 68.54ºC
** Bottom curve inflection point: 67.97 ºC
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__NOTOC__
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Revision as of 09:02, 24 September 2014

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Tasks for September 10

  • To complete film synthesis from September 5
  • To begin film preparation of ionic liquid modified clays
  • To analyse DSC data

Completion of Film Synthesis

Continued from Dr. Harting's procedure

  • Placed in sodium sulfate solution, followed by 1% HCl solution and finally in Sodium Bicarbonate

Film preparation of ionic liquid modified clay

  • Procedure followed as detailed by Dr. Harting
    • Added 1.12 g of of Sodium Montmorillonite (NaMT) to a scintillation vial containing 20mL of 50:50 HPLC grade water:ethanol.
    • Added 0.523 g of tributylhexadecylphosphonium bromide (THP Br) to exchange 100% of the Na from the clay.
      • 1.12 g NaMt × (92×10-3/100g NaMT)×(507.65g THP Br/mol) = 0.523 g of THP Br

DSC (Differential Scanning Calorimetry) Data

Note: To calculate mass of water evaporated the following equation was used: q=mHv. So that mass of water=(q×mass of sample)/Hv where Hv=2.23×103 J/g<br.> PVA film in 2 ppm MG solution<br.> <br.>

  • Onset of water evaporation: 99.59ºC
  • Heat of hydrate decomposition: 830.4 J/g
  • Mass of water evaporated = 0.00144 g
  • Major peaks in water:
    • Minimum at 134.73ºC, other peaks at 101, 103 ºC
  • Glass transition:
    • Top curve inflection point: 68.58ºC
    • Bottom curve inflection points: 69.39, 85.00ºC<br.>

PVA film in 8 ppm MG solution<br.>

  • Onset of water evaporation: 100.91ºC
  • Heat of hydrate decomposition: 1130 J/g
  • Mass of water evaporated = 0.00177 g
  • Major peaks in water:
    • Minimum at 103.58ºC, other peaks at 107, 117 and 120ºC
  • Glass transition:
    • Top curve inflection point: 68.11ºC
    • Bottom curve inflection points: 68.94, 87.66 ºC<br.>

PVA film in 80 ppm MG solution<br.>

  • Onset of water evaporation: 99.82ºC
  • Heat of hydrate decomposition: 1458 J/g
  • Mass of water evaporated = 0.00257 g
  • Major peaks in water:
    • Minimum at 110ºC, other peaks at 117 and 130.
  • Glass transition:
    • Top curve inflection point: 68.17ºC
    • Bottom curve inflection point: 68.56ºC<br.>

PVA film in 200 ppm MG solution<br.>

  • Onset of water evaporation: 99.77ºC
  • Heat of hydrate decomposition: 938.2 J/g
  • Mass of water evaporated = 0.00147 g
  • Major peaks in water:
    • Minimum at 125.54ºC, other peaks at 101, 105 and 136
  • Glass transition:
    • Top curve inflection point: 68.36ºC
    • Bottom curve inflection point: 69.15 ºC<br.>

PVA-Clay film in 2 ppm MG solution<br.>

  • Onset of water evaporation: 100.51ºC
  • Heat of hydrate decomposition: 1276 J/g
  • Mass of water evaporated = 0.00232 g
  • Major peaks in water:
    • Minimum at 107ºC, other peaks at 109, 111 and 125ºC
  • Glass transition:
    • Top curve inflection point: 68.16ºC
    • Bottom curve inflection point: 68.70 ºC<br.>

PVA-Clay film in 8 ppm MG solution<br.>

  • Onset of water evaporation: 98.55ºC
  • Heat of hydrate decomposition: 865.9 J/g
  • Mass of water evaporated = 0.00213 g
  • Major peaks in water:
    • Minimum at 101.19ºC, other peaks at 104, 130ºC
  • Glass transition:
    • Top curve inflection point: 68.59ºC
    • Bottom curve inflection point: 69.02 ºC<br.>

PVA-Clay film in 80 ppm MG solution<br.>

  • Onset of water evaporation: 100.76ºC
  • Heat of hydrate decomposition: 1044 J/g
  • Mass of water evaporated = 0.00158 g
  • Major peaks in water:
    • Minimum at 101.94ºC, other peaks at 105, 108ºC
  • Glass transition:
    • Top curve inflection point: 68.27ºC
    • Bottom curve inflection point: 68.50 ºC<br.>

PVA-Clay film in 200 ppm MG solution<br.> <br.>

  • Onset of water evaporation: 99.70ºC
  • Heat of hydrate decomposition: 1138 J/g
  • Mass of water evaporated = 0.00177 g
  • Major peaks in water:
    • Minimum at 108ºC, other peaks at 110, 131ºC
  • Glass transition:
    • Top curve inflection point: 68.54ºC
    • Bottom curve inflection point: 67.97 ºC


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