East, Christopher

Wallace, Andrew

Al-Hamzah, Ali

Doherty, William Orlando Sinclair

Fellows, Christopher

2009

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.

Journal of Applied Polymer Science, 115(4), p. 2127-2135

1097-4628

0021-8995

https://hdl.handle.net/1959.11/5458

John Wiley & Sons, Inc

Effect of Poly(acrylic acid) Molecular Mass and End-Group Functionality on Calcium Oxalate Crystal Morphology and Growth

Journal Article

Publication