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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
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Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications
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Published on: August 28, 2015

Determination of solubility parameters for poly(3-hydroxyalkanoates).

M Terada1, R H Marchessault

  • 1McGill University, Chemistry Department and Pulp and Paper Centre, Montreal, Québec, Canada.

International Journal of Biological Macromolecules
|July 23, 1999
PubMed
Summary
This summary is machine-generated.

Hansen solubility parameters predict poly(3-hydroxyalkanoates) solubility by analyzing dispersion, polar, and hydrogen bonding forces. A linear trend was observed with increasing side chain length in PHA polymers.

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Area of Science:

  • Polymer Science
  • Materials Chemistry
  • Physical Chemistry

Background:

  • Poly(3-hydroxyalkanoates) (PHAs) are biodegradable polymers with diverse applications.
  • Understanding PHA solubility is crucial for processing and application development.
  • Hansen solubility parameters (HSP) offer a theoretical framework for predicting solubility.

Purpose of the Study:

  • To apply Hansen's three-dimensional solubility parameters to poly(3-hydroxyalkanoates) (P(3HA)).
  • To evaluate the solubility of poly(3-hydroxybutyrate) (PHB) in 38 solvents using HSP.
  • To investigate the relationship between PHA side chain length and solubility parameters.

Main Methods:

  • Calculation of dispersion, polar, and hydrogen bonding components of HSP for P(3HA).
  • Comparison of theoretical HSP predictions with experimental solubility data for PHB.
  • Analysis of Hansen and Hildebrand parameters for PHA homopolymers with varying side chain lengths (up to C13).

Main Results:

  • HSP successfully predicted PHB solubility in various solvents, aligning with experimental findings.
  • A linear correlation was identified between calculated solubility parameters and PHA side chain length.
  • The study highlights discrepancies in existing PHB solubility data.

Conclusions:

  • Hansen solubility parameters provide a valuable tool for understanding and predicting P(3HA) solubility.
  • Side chain length significantly influences the solubility behavior of PHA polymers.
  • Further research is needed to address crystallinity and molecular weight effects on PHB solubility.