Abstract
Polycarboxylate polymers are well known as effective inhibitors of calcium phosphate crystal growth. Model crystal growth inhibition measurements show that polycarboxylates require the addition of calcium in the form of dissolved salt to increase their efficiency. Importantly, polycarboxylates exhibit maximum crystal growth inhibition activity in a narrow molecular weight range. The latter is around 1000 to 2000 for acrylate-maleate copolymers and around 5000 to 6000 for polyacrylates. The role of calcium and the dependence on polymer molecular weight have been studied by adsorption, calcium binding studies and electrokinetic measurements. The results obtained show that complete surface coverage is required for effective inhibition of crystal growth by polymers. Importantly, the molecular weight effect results from competition for polymer between the substrate and the dissolved calcium.
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Howie-Meyers, C.L. et al. (1995). Crystal Growth Inhibition of Hydroxyapatite by Polycarboxylates. In: Amjad, Z. (eds) Mineral Scale Formation and Inhibition. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1400-2_15
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DOI: https://doi.org/10.1007/978-1-4899-1400-2_15
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