Abstract
The adsorption isotherms of three poly(phosphino)acrylates, with a different molecular weight, on calcium fluoride have been determined at pH = 7. The shapes of the curves are characteristic of high affinity isotherms. The unexpected sequence in adsorption levels seems to bear a relationship with the PO2 content for the poly(phosphine)acrylates, but is not reflected by the growth inhibiting performance of the polymers. Up to a dosage of total growth blockage the polymers are fully adsorbed on the crystal surface. Their presence below a monomolecular layer was demonstrated by FTIR measurements, performed on a wet slurry as well as on dried CaF2 crystals.
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