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Title: Effect of Poly(acrylic acid) Molecular Mass and End-Group Functionality on Calcium Oxalate Crystal Morphology and Growth
Contributor(s): East, Christopher (author); Wallace, Andrew  (author); Al-Hamzah, Ali (author); Doherty, William Orlando Sinclair (author); Fellows, Christopher  (author)orcid 
Publication Date: 2009
DOI: 10.1002/app.31342
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Abstract: A number of series of poly(acrylic acids)(PAA) of differing end-groups and molecular mass were used to study the inhibition of calcium oxalate crystallization. The effects of the end-group on crystal speciation and morphology were significant and dramatic, with hexyl-isobutyrate end groups giving preferential formation of calcium oxalate dihydrate (COD) rather than the more stable calcium oxalate monohydrate (COM), while both more hydrophobic end-groups and less-hydrophobic end groups led predominantly to formation of the least thermodynamically stable form of calcium oxalate, calcium oxalate trihydrate. Conversely, molecular mass had little impact on calcium oxalate speciation or crystal morphology. It is probable that the observed effects are related to the rate of desorption of the PAA moiety from the crystal(lite) surfaces and that the results point to a major role for end-group as well as molecular mass in controlling desorption rate.
Publication Type: Journal Article
Source of Publication: Journal of Applied Polymer Science, 115(4), p. 2127-2135
Publisher: John Wiley & Sons Inc
Place of Publication: United States of America
ISSN: 1097-4628
Field of Research (FOR): 030603 Colloid and Surface Chemistry
030399 Macromolecular and Materials Chemistry not elsewhere classified
090805 Food Processing
Socio-Economic Outcome Codes: 820304 Sugar
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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