Difference between revisions of "User:Karlena L. Brown/Notebook/PVOH Research/2012/11/09"

From OpenWetWare
Jump to: navigation, search
(Acetylation Reaction Calculations)
(Acetylation Reaction Calculations)
Line 37: Line 37:
  
 
==Acetylation Reaction Calculations==
 
==Acetylation Reaction Calculations==
1:1 HoAc Reaction Ratio:
+
'''1:1 HoAc Reaction Ratio:'''
 
   '''MW R-CH<sub>2</sub>CHOH-R: 44.00 g/mol'''
 
   '''MW R-CH<sub>2</sub>CHOH-R: 44.00 g/mol'''
 
   '''MW Acetic Acid (HoAc): 60.00 g/mol'''
 
   '''MW Acetic Acid (HoAc): 60.00 g/mol'''
Line 43: Line 43:
 
   1.36g HoAc × (1mL HoAc/1.05g HoAc)= 1.30mL HoAc
 
   1.36g HoAc × (1mL HoAc/1.05g HoAc)= 1.30mL HoAc
  
20% HoAc Reaction Ratio:
+
'''20% HoAc Reaction Ratio:'''
 
   '''MW R-CH<sub>2</sub>CHOH-R: 44.00 g/mol'''
 
   '''MW R-CH<sub>2</sub>CHOH-R: 44.00 g/mol'''
 
   '''MW Acetic Acid (HoAc): 60.00 g/mol'''
 
   '''MW Acetic Acid (HoAc): 60.00 g/mol'''
Line 49: Line 49:
 
   0.27g HoAc × (1mL HoAc/1.05g HoAc)= 0.26mL HoAc
 
   0.27g HoAc × (1mL HoAc/1.05g HoAc)= 0.26mL HoAc
  
40% HoAc Reaction Ratio:
+
'''40% HoAc Reaction Ratio:'''
 
   '''MW R-CH<sub>2</sub>CHOH-R: 44.00 g/mol'''
 
   '''MW R-CH<sub>2</sub>CHOH-R: 44.00 g/mol'''
 
   '''MW Acetic Acid (HoAc): 60.00 g/mol'''
 
   '''MW Acetic Acid (HoAc): 60.00 g/mol'''
Line 55: Line 55:
 
   0.55g HoAc × (1mL HoAc/1.05g HoAc)= 0.52mL HoAc
 
   0.55g HoAc × (1mL HoAc/1.05g HoAc)= 0.52mL HoAc
  
60% HoAc Reaction Ratio:
+
'''60% HoAc Reaction Ratio:'''
 
   '''MW R-CH<sub>2</sub>CHOH-R: 44.00 g/mol'''
 
   '''MW R-CH<sub>2</sub>CHOH-R: 44.00 g/mol'''
 
   '''MW Acetic Acid (HoAc): 60.00 g/mol'''
 
   '''MW Acetic Acid (HoAc): 60.00 g/mol'''

Revision as of 12:38, 30 November 2012

Owwnotebook icon.png PVOH Research <html><img src="/images/9/94/Report.png" border="0" /></html> Main project page
<html><img src="/images/c/c3/Resultset_previous.png" border="0" /></html>Previous entry<html>      </html>Next entry<html><img src="/images/5/5c/Resultset_next.png" border="0" /></html>

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 PROCEDURE ABOVE FOUR TIMES TO PREPARE FOUR FILMS

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 Calculations

1:1 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