User:Melissa Novy/Notebook/CHEM-581/2012/11/14

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(Autocreate 2012/11/14 Entry for User:Melissa_Novy/Notebook/CHEM-581)
Current revision (08:59, 28 November 2012) (view source)
 
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==Entry title==
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==Objectives==
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* Insert content here...
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* Acetylate PVOH (MW 22000). The protocol was based on the acetylation carried out on [[User:Moira_M._Esson/Notebook/CHEM-581/2012/11/09|2012/11/09]].
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* Soak films in CuSO<sub>4</sub> and NaSO<sub>4</sub> solutions for ISE.
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==Acetylation of PVOH to Make PVAc==
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* Three solutions of PVOH and acetic acid (HAc) were prepared at the following mole percentages of HAc to PVOH: 20%, 40%, 60%, and 100%.
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* 5-DTAF was added to each solution such that the dye would react with 0.01% of the hydroxide groups of PVOH.
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  '''MW repeating unit of PVOH, [C<sub>2</sub>H<sub>3</sub>OH]<sub>n</sub>: 44.06 g/mol'''
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  '''1 g PVOH × (1 mol [C<sub>2</sub>H<sub>3</sub>OH]<sub>n</sub>/44.06 g) × (1 mol OH/1 mol [C<sub>2</sub>H<sub>3</sub>OH]<sub>n</sub>) = 0.022696 mol OH/g PVOH'''
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  '''MW 5-DTAF: 495. 28 g/mol'''
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  '''0.022696 mol OH × 0.0001 = 2.2696 × 10<sup>-6</sup> mol 5-DTAF'''
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  '''2.2696 × 10<sup>-6</sup> mol 5-DTAF × (495.28 g/1 mol 5-DTAF = 0.001124 g 5-DTAF'''
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* Please refer to [[User:Moira_M._Esson/Notebook/CHEM-581/2012/11/14|Moira Esson's entry]] for notes and observations about the reaction.
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Objectives

  • Acetylate PVOH (MW 22000). The protocol was based on the acetylation carried out on 2012/11/09.
  • Soak films in CuSO4 and NaSO4 solutions for ISE.

Acetylation of PVOH to Make PVAc

  • Three solutions of PVOH and acetic acid (HAc) were prepared at the following mole percentages of HAc to PVOH: 20%, 40%, 60%, and 100%.
  • 5-DTAF was added to each solution such that the dye would react with 0.01% of the hydroxide groups of PVOH. 
  MW repeating unit of PVOH, [C2H3OH]n: 44.06 g/mol
  1 g PVOH × (1 mol [C2H3OH]n/44.06 g) × (1 mol OH/1 mol [C2H3OH]n) = 0.022696 mol OH/g PVOH

  MW 5-DTAF: 495. 28 g/mol
  0.022696 mol OH × 0.0001 = 2.2696 × 10-6 mol 5-DTAF
  2.2696 × 10-6 mol 5-DTAF × (495.28 g/1 mol 5-DTAF = 0.001124 g 5-DTAF



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