User:Moira M. Esson/Notebook/CHEM-581/2012/09/07: Difference between revisions
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'''General Protocol for DSC:''' | '''General Protocol for DSC:''' | ||
# Weigh out the mass of a Tzero pan+Tzero lid(Record this measurement) | # Weigh out the mass of a Tzero pan+Tzero lid(Record this measurement) | ||
# Cut and weigh out ~ 280 - 320mg of PVOH film sample to place in the Tzezo pan | |||
# Once each sample is placed in the pan, then place the lid onto the pan | |||
# Use a Tzezo press to secure and press the lid tightly over top the sample within the pan | |||
# Open TA instrument explorer on computer. Select instrument to be used(in this case DSC) | # Open TA instrument explorer on computer. Select instrument to be used(in this case DSC) | ||
# On control button, click event to create a new event | # On control button, click event to create a new event | ||
# To create a new event or run, click either the apply or append commands | |||
# To modify a run, go to the experimental command and run a method edit | |||
# Save all changes made to an experimental run in order to analyze samples | |||
*Further notes on DSC program | |||
# Set flange temperature at -80°C | # Set flange temperature at -80°C | ||
# Equilibrate at 20.00°C | # Equilibrate at 20.00°C | ||
Line 80: | Line 87: | ||
# Ramp 20.00°C/min to 20.00°C | # Ramp 20.00°C/min to 20.00°C | ||
# Repeat steps 5 and 6 one time | # Repeat steps 5 and 6 one time | ||
<br> | |||
To Collect the information from the DSC: | |||
# Click on export data file command | |||
# Go to file and plot signals command | |||
# Export the information obtained and save it(if possible save on flash drive) | |||
# Go to signals command and select signal section, then time command underneath | |||
# Select the analyze data command, then afterwards the integrate peaks command underneath | |||
# Accept values established by integrating the peaks | |||
# Click the analyze data command again to assign the glass transition value | |||
# Select the area in which the glass transition point is seen and integrate that information | |||
# Accept the values established from the glass transition point | |||
* About 3 mg ± 20% PVOH film was placed in a DSC pan. | * About 3 mg ± 20% PVOH film was placed in a DSC pan. |
Revision as of 17:31, 24 September 2012
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Objectives
PVOH(MW 130,000) Films
Prepared PVOH(MW 130,000) Films
Note:Complete dissolution of the PVOH required a longer amount of stirring(~2hours) and the addition of more deionized H2O. To prompt complete dissolution, solutions were transferred to larger beakers(~50mL) with larger amounts of H2O. Crosslinking PVOH FilmsStandard Protocol for Crosslinking of films:
Crosslinked PVOH Films:
Solubility of PVOH FilmsGeneral Protocol:
Viscosity of uncrosslinked PVOH(MW 22,000) 15wt% maleic acid
DSC on PVOH FilmsDSC will be used to determine the different thermal transitions of the various films General Protocol for DSC:
Notes
Observations
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