User:Karlena L. Brown/Notebook/PVOH Research/2013/04/24

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(Autocreate 2013/04/24 Entry for User:Karlena_L._Brown/Notebook/PVOH_Research)
Current revision (02:37, 15 April 2013) (view source)
(PVOH Film Preparations)
 
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==PVOH Film Preparations==
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==OBJECTIVES==
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'''Prepared PVOH films in water:'''
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* Present a detailed explanation as well as presentation of research conducted over the semester (FINAL GRADE)
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* In 10mL beaker, weigh out ~ 0.5 grams PVOH (MW 130,000)
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'''(Actual Mass = 0.4934g)'''
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* Then, using a graduated cylinder add ~ 3 mL H<sub>2</sub>O to the beaker
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* In another 10mL beaker, weigh out ~ 1.0 gram PVOH (MW 130,000)
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'''(Actual Mass = 0.9965g)'''
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* Then, using a graduated cylinder add ~ 5 mL H<sub>2</sub>O to the beaker
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'''Standard PVOH Film Protocol:'''
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* 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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* On hot plate, stir and heat both beaker solutions at 70-80°C for ~ 12 min or until PVOH dissolves.
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* 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:'''
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* An additional 2-3 mL H<sub>2</sub>O was added to each solution to aid the dissolving of the PVOH
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* Heat was reduced when solutions began to boil too rapidly
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* While transferring solutions to Teflon dishes, loss of sample within the small beakers (sample loss = incomplete sample transfer)
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OBJECTIVES

  • Present a detailed explanation as well as presentation of research conducted over the semester (FINAL GRADE)



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