Difference between revisions of "User:Karlena L. Brown/Notebook/PVOH Research/2012/11/14"

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(Autocreate 2012/11/14 Entry for User:Karlena_L._Brown/Notebook/PVOH_Research)
 
(Standardization Preparation Protocol)
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==PVOH Film Preparations==
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==OBJECTIVES==
'''Prepared PVOH films in water:'''
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==Standardization Preparation Protocol==
* In 10mL beaker, weigh out ~ 0.5 grams PVOH (MW 130,000)
 
'''(Actual Mass = 0.4934g)'''
 
* Then, using a graduated cylinder add ~ 3 mL H<sub>2</sub>O to the beaker
 
* In another 10mL beaker, weigh out ~ 1.0 gram PVOH (MW 130,000)
 
'''(Actual Mass = 0.9965g)'''
 
* Then, using a graduated cylinder add ~ 5 mL H<sub>2</sub>O to the beaker
 
  
'''Standard PVOH Film Protocol:'''
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==Standardization Calculations==
* After adding and combining PVOH (MW 130,000) in small beakers with H<sub>2</sub>O, add stir bars and prepare to stir solution.
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==Swelling Test Protocal==
* On hot plate, stir and heat both beaker solutions at 70-80°C for ~ 12 min or until PVOH dissolves.
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==Swelling Test Result Analysis==
* Once PVOH solids thoroughly dissolve in solution, pour each solution in a Teflon dish to sit, cool, and dry in a fume hood for ~ 1 day.
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==Notes==
 
 
'''Notes:'''
 
* An additional 2-3 mL H<sub>2</sub>O was added to each solution to aid the dissolving of the PVOH
 
* Heat was reduced when solutions began to boil too rapidly
 
* While transferring solutions to Teflon dishes, loss of sample within the small beakers (sample loss = incomplete sample transfer)
 
  
  

Revision as of 12:14, 30 November 2012

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OBJECTIVES

Standardization Preparation Protocol

Standardization Calculations

Swelling Test Protocal

Swelling Test Result Analysis

Notes