Abstract
An attempt was made to determine the existence of LCST behavior for the PMMA–MMA–n-Pentane binary system at a reasonable temperature. For the cloudpoint studies, primary standard PMMA (HI < 1.1) was purchased from Pressure Chemical Corp. (Pittsburgh, PA), with a molecular weight of 6,500 g/mol. As-received MMA was used in the determination of cloudpoint. The same apparatus was used in this study, as the one used for cloudpoint experiments in Sect. 1.1 of Caneba (2010). A constant proportion of PMMA relative to MMA of 52.4 g/g was used. The proportion of n-Pentane relative to MMA+PMMA was varied, by adding certain amounts of n-Pentane to aliquots of the PMMA–MMA mixture. The inverse-temperature cloudpoint was obtained by slowly raising the PMMA–MMA–n-Pentane temperature until the solution became turbid. The exact cloudpoint temperature was obtained at the onset of cloudiness. Thus, Table 13.1 shows cloudpoint temperature values of starting PMMA–MMA–n-Pentane mixtures used. It should be noted that at 28 wt% MMA, the system did not exhibit a clear LCST-based cloudpoint temperature, because the fluid was always turbid from room temperature up to 110°C. This supports the contention that an hourglass-shaped phase envelope was obtained from the PMMA–n-Pentane system.
Keywords
- Emulsion Polymerization
- Sodium Lauryl Sulfate
- Lauryl Sulfate
- Reasonable Temperature
- Cloudpoint Temperature
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsReference
Caneba GT (2010) Free-radical retrograde-precipitation polymerization (FRRPP): Novel concept, processes, materials, and energy aspects. Springer, Heidelberg. ISBN 978-3-642-03024-6
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2011 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Caneba, G., Dar, Y. (2011). Cloudpoint Studies of PMMA–MMA–n-Pentane Systems. In: Emulsion-based Free-Radical Retrograde-Precipitation Polymerization. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-19872-4_13
Download citation
DOI: https://doi.org/10.1007/978-3-642-19872-4_13
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-19871-7
Online ISBN: 978-3-642-19872-4
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)