User:Elizabeth Ghias/Notebook/Experimental Chemistry/2013/02/15: Difference between revisions
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==Objective== | ==Objective== | ||
To crosslink the films prepared last class, to try the new reaction with (S)-(-)-(3-Chloro-2-hydroxypropyl)trimethylammonium chloride, and to run DSC on our samples. | |||
==Description== | ==Description== | ||
<u>Crosslinking Films</u> | |||
# Heat 5 beakers with 100 mL of 0.7 M HCl | |||
# Once heated to 70 °C add the five films. | |||
# Heat the films for 1 hour | |||
# Prepare 5 solutions of 1.68 g sodium bicarbonate in 100 mL water | |||
# Rinse the films in distilled water, then place in sodium bicarbonate solution. | |||
# Allow to soak in bicarbonate solution for 15 minutes. | |||
# Rinse films in distilled water and then dry to run DSC. | |||
<u>(S)-(-)-(3-Chloro-2-hydroxypropyl)trimethylammonium chloride Reaction</u> | |||
# Measure out 4 samples of 2 g PVOH (MW = 22,000) | |||
# Measure out 0.85779 g (S)-(-)-(3-Chloro-2-hydroxypropyl)trimethylammonium chloride. Place in 5 mL 0.2 M NaOH prepared last class) | |||
#* Actual amount used = 0.8581 g | |||
# Transfer 0.5 mL, 0.05 mL, and 0.005 mL into 9 mL, 9.9 mL and 9.99 mL 0.2 M NaOH, respectively (this means the 10% film will be slightly less than 10% but we can still calculate what percentage)→ using 10 mL b/c were doing 2 gram scale. For 1 g scale use 5 mL. | |||
# Place the 4 samples of PVOH in 5 mL | |||
# Allow to soak in the NaOH for 30 minutes | |||
# Add 1 sample PVOH to one of the ammonium chloride samples and allow them to mix for 1 hour | |||
# If the PVOH is still soluble in NaOH, add acetone to precipitate it out. (keep water to a minimum) | |||
# Then do a quick wash with ice water to get precipitate out extra ions | |||
==Data== | ==Data== |
Revision as of 12:14, 15 February 2013
Experimental Chemistry | <html><img src="/images/9/94/Report.png" border="0" /></html> Main project page <html><img src="/images/c/c3/Resultset_previous.png" border="0" /></html>Previous entry<html> </html>Next entry<html><img src="/images/5/5c/Resultset_next.png" border="0" /></html> |
ObjectiveTo crosslink the films prepared last class, to try the new reaction with (S)-(-)-(3-Chloro-2-hydroxypropyl)trimethylammonium chloride, and to run DSC on our samples. DescriptionCrosslinking Films
Data
NotesThis area is for any observations or conclusions that you would like to note.
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