User:Moira M. Esson/Notebook/CHEM-581/2012/09/05: Difference between revisions
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#For each additional 0.5g, add an additional ~2mL of water | #For each additional 0.5g, add an additional ~2mL of water | ||
#Add the wanted weight percent of either maleic or succinic acid | #Add the wanted weight percent of either maleic or succinic acid | ||
#Add ~2 drops of HCl or H<sub>3</sub>PO<sub>4 | #Add ~2 drops of HCl or H<sub>3</sub>PO<sub>4</sub> | ||
#* | #*Note: HCl and H<sub>3</sub>PO<sub>4</sub> are corrosive | ||
#Place on hot plate and heat to 70°C-80°C | #Place on hot plate and heat to 70°C-80°C | ||
#Stir and heat until dissolved(~15 min) | #Stir and heat until dissolved(~15 min) | ||
Line 31: | Line 31: | ||
**1.0054g PVOH (MW 22,000), 15 wt% maleic acid(actual mass added was 0.1565g), 2 drops H<sub>3</sub>PO<sub>4 | **1.0054g PVOH (MW 22,000), 15 wt% maleic acid(actual mass added was 0.1565g), 2 drops H<sub>3</sub>PO<sub>4 | ||
**1.0g PVOJ (MW 22,000), 15 wt% succinic acid, 2 drops H<sub>3</sub>PO<sub>4 | **1.0g PVOJ (MW 22,000), 15 wt% succinic acid, 2 drops H<sub>3</sub>PO<sub>4 | ||
*An additional 2mL H<sub>2</sub>O | *An additional 2mL H<sub>2</sub>O was added to each solution (~10 minutes into heating) to aid in the dissolution of PVOH | ||
<br> | |||
==Viscosity of PVOH (MW 130,000) Stock Solutions== | |||
*The General Protocols for both serial dilutions and viscosity described on 08/31 were used | |||
<br> | |||
'''Stock Solution Calculations''' | |||
* Stock Solution Preparation for PVOH (MW 130,000) | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Initial Mass [g]''' | |||
| align="center" style="background:#f0f0f0;"|'''Additional Mass [g]''' | |||
| align="center" style="background:#f0f0f0;"|'''Total Mass [g]''' | |||
| align="center" style="background:#f0f0f0;"|'''Stock Volume [mL]''' | |||
| align="center" style="background:#f0f0f0;"|'''Concentration ['''M''']''' | |||
| align="center" style="background:#f0f0f0;"|'''Weight percent [%]''' | |||
|- | |||
| 2.0342||5.0203||7.0545||500||1.09E-4||1.41||| | |||
|} | |||
*Serial Dilution of PVOH (MW 130,000) Stock Solution | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Dilution''' | |||
| align="center" style="background:#f0f0f0;"|''''''M<sub>1'''[mol/L]''' | |||
| align="center" style="background:#f0f0f0;"|''''''V<sub>1''' [mL]''' | |||
| align="center" style="background:#f0f0f0;"|''''''M<sub>2'''[mol/L]''' | |||
| align="center" style="background:#f0f0f0;"|''''''V<sub>2''' [mL]''' | |||
|- | |||
| 1||1.09E-4||6.25||1.36-5||50|| | |||
|- | |||
| 2||1.09E-4||12.5||2.71E-4||50|| | |||
|- | |||
| 3||1.09E-4||25 ||5.43E-4||50|| | |||
|- | |||
| 4||1.09E-4||35.5||8.14E-4||50|| | |||
|} | |||
<br> | |||
'''Viscosity Calculations''' | |||
Viscosity of pure H<sub>2</sub>O at 24.5°C | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Trial [ ]''' | |||
| align="center" style="background:#f0f0f0;"|'''Time [s]''' | |||
|- | |||
| 1||278.69 | |||
|- | |||
| 2||283.09 | |||
|- | |||
| 3||280.24 | |||
|- | |||
|} | |||
* Average time = 280.67 s | |||
<br> | |||
Viscosity of 13.6 μM PVOH in H<sub>2</sub>O at 24.5°C | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Trial [ ]''' | |||
| align="center" style="background:#f0f0f0;"|'''Time [s]''' | |||
|- | |||
| 1||263.59 | |||
|- | |||
| 2||263.12 | |||
|- | |||
| 3||263.01 | |||
|- | |||
|} | |||
* Average time = 263.24 s | |||
<br> | |||
Viscosity of 27.1 μM PVOH in H<sub>2</sub>O at 24.5°C | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Trial [ ]''' | |||
| align="center" style="background:#f0f0f0;"|'''Time [s]''' | |||
|- | |||
| 1||322.23 | |||
|- | |||
| 2||316.28 | |||
|- | |||
| 3||316.25 | |||
|- | |||
|} | |||
* Average time = 318.25 s | |||
<br> | |||
Viscosity of 54.3 μM PVOH in H<sub>2</sub>O at 24.5°C | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Trial [ ]''' | |||
| align="center" style="background:#f0f0f0;"|'''Time [s]''' | |||
|- | |||
| 1||400.68 | |||
|- | |||
| 2||398.66 | |||
|- | |||
| 3||398.73 | |||
|- | |||
|} | |||
* Average time = 399.36 s | |||
<br> | |||
Viscosity of 81.4 μM PVOH in H<sub>2</sub>O at 24.5°C | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Trial [ ]''' | |||
| align="center" style="background:#f0f0f0;"|'''Time [s]''' | |||
|- | |||
| 1||604.14 | |||
|- | |||
| 2||610.79 | |||
|- | |||
| 3||608.64 | |||
|- | |||
|} | |||
* Average time = 607.86 s | |||
<br> | |||
Viscosity of 10.9 mM PVOH in H<sub>2</sub>O at 24.5°C | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Trial [ ]''' | |||
| align="center" style="background:#f0f0f0;"|'''Time [s]''' | |||
|- | |||
| 1||955.96 | |||
|- | |||
| 2||957.38 | |||
|- | |||
| 3||967.46 | |||
|- | |||
|} | |||
* Average time = 960.27 s | |||
<br> | |||
==Notes== | |||
*Another film was prepared specifically for IR analysis | |||
**Film was prepared using 0.1154g PVOH (MW 22,000) in 3mL H<sub>2</sub>O. After heating and dissolution(described in the General Protocol for preparation of films), film was poured into a large Teflon dish to create an extremely thin film | |||
Revision as of 09:37, 16 October 2012
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Objectives
PVOH (MW 22,000) FilmsGeneral Protocol:
Viscosity of PVOH (MW 130,000) Stock Solutions
Viscosity of pure H2O at 24.5°C
Notes
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