User:Allison K. Alix/Notebook/CHEM-581/2012/10/03: Difference between revisions

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|style="background-color: #EEE"|[[Image:BDLlogo_notext_lr.png|128px]]<span style="font-size:22px;"> Experimental Chemistry</span>
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==Description==
==Description==
Dimensional Mechanical Analysis (DMA) will be performed on previously synthesized PVOH films consisting of the following:
1) MW: 22000
2) MW: 100000
3) MW: 22000 with phosphoric acid
4) MW: 100000 with hydrochloric acid
5) MW: 22000 with phosphoric acid and maleic acid.
Samples 3-5 were crosslinked via dehydration in the oven at 120°C for 90 minutes. Samples of films 1 and 2 were also cross linked via dehydration for a before and after comparison of crosslinking.


==Data==
==Data==
* Add data and results here...
<u>PVOH MW: 22000</u>
 
height: 20.49mm


==Notes==
width: 0.22mm.  
This area is for any observations or conclusions that you would like to note.


The films that were cross-linked in the oven had some considerable changes in color and toughness:


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.
*MW 100,000: film became much tougher, no visible color changes.  
*MW 22000: no toughness or color changes.  
*MW 22000 w/ phosphoric acid: film became much tougher and turned a slight yellowish brown color.  
*MW 22000 with phosphoric acid and maleic acid: no changes in toughness or color.  
*MW: 100,000 w/ hydrochloric acid: toughness did not change but color became a very dark black


[[Category:Course]]
==Notes==
[[Category:Miscellaneous]]
A non-cross linked sample of film 1 will have to be re-analyzed as the length was entered as 3.5mm instead of 5.3mm




Latest revision as of 22:05, 26 September 2017

Experimental Chemistry Main project page
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Objective

Dynamic Mechanical Analysis of PVOH films

Description

Dimensional Mechanical Analysis (DMA) will be performed on previously synthesized PVOH films consisting of the following:

1) MW: 22000

2) MW: 100000

3) MW: 22000 with phosphoric acid

4) MW: 100000 with hydrochloric acid

5) MW: 22000 with phosphoric acid and maleic acid.

Samples 3-5 were crosslinked via dehydration in the oven at 120°C for 90 minutes. Samples of films 1 and 2 were also cross linked via dehydration for a before and after comparison of crosslinking.

Data

PVOH MW: 22000

height: 20.49mm

width: 0.22mm.

The films that were cross-linked in the oven had some considerable changes in color and toughness:

  • MW 100,000: film became much tougher, no visible color changes.
  • MW 22000: no toughness or color changes.
  • MW 22000 w/ phosphoric acid: film became much tougher and turned a slight yellowish brown color.
  • MW 22000 with phosphoric acid and maleic acid: no changes in toughness or color.
  • MW: 100,000 w/ hydrochloric acid: toughness did not change but color became a very dark black

Notes

A non-cross linked sample of film 1 will have to be re-analyzed as the length was entered as 3.5mm instead of 5.3mm



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