Aminobenzoate esters, correlations

Aldehydes, introduction in polysaccharides, 189-190 Aligned fiber moderators, flow rate, 346r Amine functions, effect on pH sensitivity of poly(ortho esters), 176-178 Aminobenzoate esters, correlations of partition coefficients for solvent pairs, 62,63/... 

Several laboratories have measured solubilities and/or partition coefficients of solutes in higher molecular weight media, and their data provides a test of this approach to estimating polymer solubilities. Flynn and Yalkowsky (17,18) studied the transport and solubility properties of a series of p-aminobenzoate esters, p-HjNCjH COOR, R = methyl to hexyl, in poly(dimethylsiloxane) fluid (PDMS). We find that their values of log P(PDMS) correlate well with reported (33) values of log P values of the same series of solutes in oleyl alcohol/water, as illustrated by the plot in Figure 8 and the correlation statistics (Equation 17). 

Figure 8. Correlation of log P of the solvent pairs silicone oil-water and oleyl alcohol-water for the series of aminobenzoate esters, p-NH2-C H4COO(CHJ H. Numbers at each data point refer to n, the ester chain length. Data from Refs. 17 and 18.

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