User:Mobeen Ashraf/Notebook/Chem-581/2012/10/03: Difference between revisions
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==Objective== | ==Objective== | ||
DMA- Dynamic Mechanical Analysis on PVOH films | |||
==Description== | ==Description== | ||
Following PVOH Films were Cross-linked: | |||
*1) PVOH film, MW of 22,000-placed in an oven set at 120 deg Celsius for 90 mins. | |||
*2) PVOH film, MW of 100,000-placed in an oven set at 120 deg Celsius for 90 mins. | |||
*3) PVOH film, MW of 100,000 cross-linked with HCl-placed in an oven set at 120 deg Celsius for 90 mins. | |||
*4) PVOH film, MW of 22,000, cross-linked H3PO4-placed in an oven set at 120 deg Celsius for 90 mins. | |||
*5) PVOH film, MW of 22,000, cross-linked with maleic acid and H3PO4-placed in an oven set at 120 deg Celsius for 90 mins. | |||
'''DMA Analysis:''' | |||
PVOH films were subject to stretch( elastic tension ) mechanical analysis to test its mechanical durability. | |||
* PVOH (film 1) was selected for DMA analysis. By using vernier calipers, the height and width of the film was measured to be 20.49 mm and 0.22 mm respectively. | |||
==Data== | ==Data== | ||
* Add data and results here... | * Add data and results here... | ||
The films that were cross-linked in the oven had some considerable changes in color and toughness: | |||
*PVOH MW 100,000- film was firmer and there was no apparent color change. | |||
*PVOH MW 22000- no apparent color and physical change that was observed. | |||
*PVOH MW 22000 cross linked with H3PO4- film became much tougher and turned a slight yellowish brown color. | |||
*PVOH MW 22000 with H3PO4 and maleic acid- no apparent color and physical change that was observed. | |||
*PVOH MW 100,000 cross-linked w/ hydrochloric acid- slightly firm, but color change was very prominent- dark, jet blackish. | |||
==Notes== | ==Notes== |
Revision as of 09:04, 8 November 2012
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ObjectiveDMA- Dynamic Mechanical Analysis on PVOH films DescriptionFollowing PVOH Films were Cross-linked:
DMA Analysis: PVOH films were subject to stretch( elastic tension ) mechanical analysis to test its mechanical durability.
Data
The films that were cross-linked in the oven had some considerable changes in color and toughness: *PVOH MW 100,000- film was firmer and there was no apparent color change. *PVOH MW 22000- no apparent color and physical change that was observed. *PVOH MW 22000 cross linked with H3PO4- film became much tougher and turned a slight yellowish brown color. *PVOH MW 22000 with H3PO4 and maleic acid- no apparent color and physical change that was observed. *PVOH MW 100,000 cross-linked w/ hydrochloric acid- slightly firm, but color change was very prominent- dark, jet blackish. NotesThis area is for any observations or conclusions that you would like to note.
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