Abstract
Dilute solution properties of poly(phenyl thiolmethacrylate) (PTPh) and poly( o-methylphenyl-thiolmethacrylate) (PTMPh) were studied by gel permeation chromatography, light scattering, osmotic pressure and viscosity measurements in different solvents. Relations between intrinsic viscosity [η], z-average root-mean-square end-to-end distance ( r ̄ 2) 1 2 and molecular weight M ̄ w were established. The unperturbed dimensions were calculated by different methods using M ̄ w and [η]. PTPh ( σ = 2.26) and PTMPh ( σ = 2.27) have practically the same flexibility, but both are more flexible than poly(phenyl methacrylate) ( σ = 2.50). In our opinion, this is due to the change in the local intramolecular interaction and the higher flexibility of the sulphur-containing side group.
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