User:Karlena L. Brown/Notebook/PVOH Research/2012/11/09: Difference between revisions
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==Acetylation Reaction Protocol & Film Preparation== | ==Acetylation Reaction Protocol & Film Preparation== | ||
* In 10mL beaker, weigh out ~ 1.0 grams PVOH (MW 22K) | * In 10mL beaker, weigh out ~ 1.0 grams PVOH (MW 22K) | ||
* Then, using a graduated cylinder add ~ | * Then, using a graduated cylinder add ~ 3-4 mL H<sub>2</sub>O to the beaker | ||
* After adding and combining PVOH (MW 22K) in a small beaker with H<sub>2</sub>O, add a stir bar and prepare to stir solution | * After adding and combining PVOH (MW 22K) in a small beaker with H<sub>2</sub>O, add a stir bar and prepare to stir solution | ||
* On hot plate, stir and heat beaker solutions at 70-80°C for ~ 12 min or until PVOH dissolves | * On hot plate, stir and heat beaker solutions at 70-80°C for ~ 12 min or until PVOH dissolves | ||
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| align="center" style="background:#f0f0f0;"|'''Acetic Acid (mL)''' | | align="center" style="background:#f0f0f0;"|'''Acetic Acid (mL)''' | ||
| align="center" style="background:#f0f0f0;"|'''Hydrochloric Acid (drops)''' | | align="center" style="background:#f0f0f0;"|'''Hydrochloric Acid (drops)''' | ||
| align="center" style="background:#f0f0f0;"|'''Total Volume(mL)''' | |||
| align="center" style="background:#f0f0f0;"|'''Total Volume(mL)''' | | align="center" style="background:#f0f0f0;"|'''Total Volume(mL)''' | ||
|- | |- | ||
| 1.0062||1.30||2||7 | | 1.0062||1.30||2||3.70||7 | ||
|- | |- | ||
| 1.0043||0.26||2||7 | | 1.0043||0.26||2||4.74||7 | ||
|- | |- | ||
| 1.0052||0.52||2||7 | | 1.0052||0.52||2||4.48||7 | ||
|- | |- | ||
| 1.0027||0.78||2||7 | | 1.0027||0.78||2||4.22||7 | ||
|} | |} | ||
Revision as of 13:03, 30 November 2012
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OBJECTIVES
General Formula for reactionsPolyvinyl alcohol + [HoAc]→Polyvinyl acetate Acetylation Reaction Protocol & Film Preparation
REPEAT PROCEDURE ABOVE FOUR TIMES TO PREPARE FOUR FILMS
Acetylation Reaction Calculations1:1 HoAc Reaction Ratio: MW R-CH2CHOH-R: 44.00 g/mol MW Acetic Acid (HoAc): 60.00 g/mol 1.0g PVOH × (1 mol PVOH/44.00g PVOH) × (1 mol HoAc/1 mol PVOH) × (60.00g HoAc/1 mol HoAc) = 1.36g HoAc 1.36g HoAc × (1mL HoAc/1.05g HoAc)= 1.30mL HoAc 20% HoAc Reaction Ratio: MW R-CH2CHOH-R: 44.00 g/mol MW Acetic Acid (HoAc): 60.00 g/mol 1.0g PVOH × (1 mol PVOH/44.00g PVOH) × (0.2 mol HoAc/1 mol PVOH) × (60.00g HoAc/1 mol HoAc) = 0.27g HoAc 0.27g HoAc × (1mL HoAc/1.05g HoAc)= 0.26mL HoAc 40% HoAc Reaction Ratio: MW R-CH2CHOH-R: 44.00 g/mol MW Acetic Acid (HoAc): 60.00 g/mol 1.0g PVOH × (1 mol PVOH/44.00g PVOH) × (0.4 mol HoAc/1 mol PVOH) × (60.00g HoAc/1 mol HoAc) = 0.55g HoAc 0.55g HoAc × (1mL HoAc/1.05g HoAc)= 0.52mL HoAc 60% HoAc Reaction Ratio: MW R-CH2CHOH-R: 44.00 g/mol MW Acetic Acid (HoAc): 60.00 g/mol 1.0g PVOH × (1 mol PVOH/44.00g PVOH) × (0.6 mol HoAc/1 mol PVOH) × (60.00g HoAc/1 mol HoAc) = 0.82g HoAc 0.82g HoAc × (1mL HoAc/1.05g HoAc)= 0.78mL HoAc |