User:Elizabeth Ghias/Notebook/Experimental Chemistry/2012/08/31: Difference between revisions

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To create crosslinked films through acid catalyzed dehydration and to perform viscosity tests.   
To create crosslinked films through acid catalyzed dehydration and to perform viscosity tests.   


==Description==
==Description==
Line 34: Line 35:
<u>Viscosity Tests (Part 1)</u>
<u>Viscosity Tests (Part 1)</u>


#
The viscosity of the MW = 130,000 PVA and the MW = 22,000 PVA were measured.
 
 
<u>MW = 130,000 PVA Solution Preparation</u>
{|style="width:400px"
|<u>% wt/mL</u>
|<u>Calculated g/mL</u>
|<u>Mass Used</u>
|<u>Total Volume</u>
 
|-
|2% wt/mL
|0.02 g/mL
|0.406 g
|20 mL
|-
|1% wt/mL
|0.01 g/mL
|0.204 g
|20 mL
|-
|0.5% wt/mL
|0.005 g/mL
|0.101 g
|20 mL
|-
|0.2% wt/mL
|0.002 g/mL
|0.041 g
|20 mL
|}
 
 
# Approximately 10 mL of the first solution tested was poured into the viscometer. 
# The time it took for the sample to travel between the two lines marked on the viscometer were recorded.
# The test was repeated 2 or 3 times for each sample
# After the first solution was removed, 10 mL of the next solution was added to the viscometer to rinse out the previous solution.
# Steps 1 - 4 were repeated for all of the remaining solutions.
 
 


==Data==
==Data==
* Add data and results here...
 
<u>Viscosity Test Results (Part 1)</u>
{|style="width:400px"
|<u>% wt/mL</u>
|<u>Time 1</u>
|<u>Time 2</u>
|<u>Time 3</u>
|<u>Average Time</u>
 
|-
|2% wt/mL
|9.35s
|9.48 s
|9.51
|9.45 s
|-
|1% wt/mL
|6.46 s
|6.16 s
|n/a
|6.31 s
|-
|0.5% wt/mL
|4.42 s
|4.47 s
|n/a
|4.445 s
|-
|0.2% wt/mL
|4.09 s
|4.11 s
|n/a
|4.10 s
|}
 


==Notes==
==Notes==

Revision as of 09:42, 1 October 2012

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Objective

To create crosslinked films through acid catalyzed dehydration and to perform viscosity tests.


Description

Film Preparation with Acid Dehydration

  • All films were prepared using PVA with a MW of 22,000

Film 1 - 0.5110 g PVA in 3 mL water, no acid was added

Film 2 - 0.5053 g PVA in 3 mL water, 2 drops of phosphoric acid was added

Film 3 - 0.5078 g PVA in 3 mL water, 2 drops of 12 M hydrochloric acid was added

Film 4 - 1.0084 g PVA in 6 mL water, no acid was added

Film 5 - 1.0010 g PVA in 6 mL water, 3 drops of phosphoric acid was added

Film 6 - 1.0044 g PVA in 6 mL water, 3 drops of 12 M hydrochloric acid was added


Viscosity Tests (Part 1)

The viscosity of the MW = 130,000 PVA and the MW = 22,000 PVA were measured.


MW = 130,000 PVA Solution Preparation

% wt/mL Calculated g/mL Mass Used Total Volume
2% wt/mL 0.02 g/mL 0.406 g 20 mL
1% wt/mL 0.01 g/mL 0.204 g 20 mL
0.5% wt/mL 0.005 g/mL 0.101 g 20 mL
0.2% wt/mL 0.002 g/mL 0.041 g 20 mL


  1. Approximately 10 mL of the first solution tested was poured into the viscometer.
  2. The time it took for the sample to travel between the two lines marked on the viscometer were recorded.
  3. The test was repeated 2 or 3 times for each sample
  4. After the first solution was removed, 10 mL of the next solution was added to the viscometer to rinse out the previous solution.
  5. Steps 1 - 4 were repeated for all of the remaining solutions.


Data

Viscosity Test Results (Part 1)

% wt/mL Time 1 Time 2 Time 3 Average Time
2% wt/mL 9.35s 9.48 s 9.51 9.45 s
1% wt/mL 6.46 s 6.16 s n/a 6.31 s
0.5% wt/mL 4.42 s 4.47 s n/a 4.445 s
0.2% wt/mL 4.09 s 4.11 s n/a 4.10 s


Notes

This area is for any observations or conclusions that you would like to note.


Use categories like tags. Change the "Course" category to the one corresponding to your course. The "Miscellaneous" tag can be used for particular experiments, as instructed by your professor. Please be sure to change or delete this tag as required so that the categories remain well organized.



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