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Measurement of cloud point temperature in polymer solutions
G A Mannella1, V La Carrubba, V Brucato
1Department of Civil, Environmental, Aerospace and Materials Engineering (DICAM), University of Palermo, Viale delle Scienze Ed. 8, 90128 Palermo, Italy. gianluca.mannella@unipa.it
The Review of Scientific Instruments
|August 2, 2013
Summary
This study introduces a new apparatus for measuring polymer solution cloud points with precise temperature control. The cooling rate significantly impacts the measured cloud point temperature, revealing kinetic effects.
Area of Science:
- Polymer Science
- Materials Characterization
- Physical Chemistry
Background:
- Characterizing polymer solutions is crucial for understanding their behavior and applications.
- Cloud point determination is a key parameter for polymer solubility and phase transitions.
- Accurate temperature control is essential for reliable measurements.
Purpose of the Study:
- To develop and instrument a temperature-controlled turbidity measurement apparatus.
- To investigate the effect of cooling rate on cloud point temperature measurements.
- To characterize polymer solutions using coupled temperature-light transmittance measurements.
Main Methods:
- Utilized Peltier cells for accurate temperature control.
- Implemented coupled temperature and light transmittance measurements.
- Employed varying cooling protocols (low and high rates) to assess kinetic effects.
- Studied a ternary polymeric solution as a case system.
Main Results:
- The developed apparatus successfully measured cloud point temperatures.
- Demonstrated that cooling rate influences the measured cloud point temperature.
- Observed kinetic effects in cloud point measurements due to different cooling rates.
Conclusions:
- The new apparatus provides precise temperature control for polymer solution characterization.
- Cooling rate is a critical factor affecting cloud point measurements, influencing observed phase behavior.
- The findings highlight the importance of controlled cooling protocols for accurate polymer solubility studies.
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