Selective adsorption of PMMA in polar binary mixtures—I. Benzyl alcohol/n-bytyl alcohol and benzyl alcohol/sec-butyl alcohol mixtures

Katime, Issa; Valenciano, R.; Teijón, José M.

doi:10.1016/0014-3057(79)90173-3

Cited by 11 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A theoretical treatment of such reversals in terms of the three binary interaction parameters in the ternary system was presented by Z ˇivny ´and Pouchly ´26 and by Gavara et al, 24 and a compilation of numerous data illustrating the reasonable agreement between the composition dependence of λ 1 as predicted by theory and as found experimentally was published by Horta and Criado-Sancho. 27 Yet, one may wonder whether the power of available theory would be adequate to explain such consequences of small changes of molecular structure as found by Katime et al, 28 who reported that for poly(methyl methacrylate) in benzyl alcohol/butanol mixtures an inversion of preferential solvation is observed with the secondary, but not the primary, butanol. Unfortunately, no studies exist on the trend of the preferential solvation parameter in systems of a flexible polymer, such as polystyrene or methacrylate), in a mixture of a good solvent and a nonpolar paraffin precipitant.…”

Section: Comparison With Previous Studies Of Preferential Solvation O...mentioning

confidence: 99%

Chiral Solvation as a Means to Quantitatively Characterize Preferential Solvation of a Helical Polymer in Mixed Solvents

Khatri¹,

Pavlova²,

Green³

et al. 1997

J. Am. Chem. Soc.

View full text Add to dashboard Cite

Poly(n-hexyl isocyanate) adopts a helical structure in solution and the preference of one helical sense induced by a nonracemic chiral solvent can be detected by the circular dichroism (CD) of the backbone chromophore of the polymer. Addition of an achiral or racemic cosolvent leads to a reduction of the CD intensity, which can be interpreted quantitatively as reflecting the composition of the solvent mixture in contact with the helical backbone of the polymer. Equilibrium constants characterizing the relation between the solvent composition in contact with the polymer and the bulk of the system are given for mixtures of (S)-1-chloro-2-methylbutane and a number of achiral or racemic cosolvents. The relationship between the structure of the cosolvent and the extent of the preferential solvation was surprising in several instances. The polymer was preferentially solvated by a highly branched hydrocarbon although it was a precipitant and the preferential solvation by alcohols extended up to the point of polymer precipitation. This unusual method for characterizing preferential solvation of this rod-like polymer is compared with other methods used previously on flexible chain macromolecules.

show abstract

Section: Comparison With Previous Studies Of Preferential Solvation O...mentioning

confidence: 99%

Chiral Solvation as a Means to Quantitatively Characterize Preferential Solvation of a Helical Polymer in Mixed Solvents

Khatri¹,

Pavlova²,

Green³

et al. 1997

J. Am. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…The relationship between intrinsic viscosity and molecular weight can be expressed by where the exponent A depends on chain solvation and, for random coils, lies between 0.5 and 0.8. The unperturbed dimensions, Ke, have been evaluated using the Stockmayer-Fixman theory : 14 qM-' = K0+0.5lCD, B d…”

mentioning

confidence: 99%