Determination of Specific Refractive Index Increment (dn/dc)μ at a Constant Chemical Potential, for Solutions of Polymer in Mixed Solvents by the GPC Method

摘要: Abstract A new chromatographic method is described for the determination of specific refractive index increment (d n /d c )ν at a constant chemical potential, polymer/mixed solvent systems. In this ) obtained by measuring areas solvated-polymer peaks when mixed used as an eluent. Values poly(dimethylsiloxane) (PDMS)-benzene-methanol system, determined proposed are in good agreement with those conventional dialysis method. The approach has advantages simplicity, fast speed, and high reproducibility. experimental results stearic acid-chloroform-methanol system show that can also be applied to nonpolymer/mixed systems )ν.