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 are corrosive | #*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) | ||
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*An additional 2mL H<sub>2</sub>O was added to each solution (~10 minutes into heating) to aid in the dissolution of PVOH | *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> | <br> | ||
==Viscosity of PVOH (MW 130,000) Stock Solutions== | ==Viscosity of PVOH (MW 130,000) Stock Solutions== | ||
*The General Protocols for both serial dilutions and viscosity described on 08/31 were used | *The General Protocols for both serial dilutions and viscosity described on 08/31 were used | ||
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| align="center" style="background:#f0f0f0;"|''''''V<sub>2''' [mL]''' | | align="center" style="background:#f0f0f0;"|''''''V<sub>2''' [mL]''' | ||
|- | |- | ||
| 1|| | | 1||1.09E-4||6.25||1.36-5||50|| | ||
|- | |- | ||
| 2|| | | 2||1.09E-4||12.5||2.71E-4||50|| | ||
|- | |- | ||
| 3|| | | 3||1.09E-4||25 ||5.43E-4||50|| | ||
|- | |- | ||
| 4|| | | 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 | Viscosity of pure H<sub>2</sub>O at 24.5°C | ||
{| {{table}} | {| {{table}} | ||
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|} | |} | ||
* Average time = 960.27 s | * 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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