OBJECTIVES
- Prepare PVOH films for Acetylation Reactions
Acetylation Reaction Protocol & Film Preparation
- In 10mL beaker, weigh out ~ 1.0 grams PVOH (MW 22K)
- Then, using a graduated cylinder add ~ 5 mL H2O to the beaker
- After adding and combining PVOH (MW 22K) in a small beaker with H2O, 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
- Once PVOH solids thoroughly dissolve in solution, add a small portion of acetic acid (HoAc)
- In addition, add ~2 drops of HCl to the solution and continue to stir for an hour
- Allow the solution to cool and prepare for titration
REPEAT STANDARD PROCEDURE ABOVE FOUR TIMES
| PVOH Mass (g)
| Acetic Acid (mL)
| Hydrochloric Acid (drops)
|
| 1.0062 | 1.30 | 2
|
| 1.0043 | 0.26 | 2
|
| 1.0052 | 0.52 | 2
|
| 1.0027 | 0.78 | 2
|
Acetylation Reaction Film Preparation
Acetylation Reaction Calculations
|
PVOH Research
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