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In this paper, the objective is to point out some characteristics of stereoregular biopolymers, especially concerning their behaviour in aqueous solutions. Firstly, stereoregular polymers such as DNA, polypeptides and some polysaccharides adopt helical conformations at given thermodynamic conditions. This conformation is semi-rigid forming liquid cristalline phases and/or cooperative interactions...
Precise measurements of the viscosities of solutions of sodium polystyrenesulfonate in water and in 2‐ethoxyethanol–water mixtures containing varying amounts of 2‐ethoxyethanol have been performed at 308.15, 313.15, 318.15 and 323.15 K. The intramolecular contributions to the reduced viscosities of the polyelectrolyte solutions were obtained through isoionic dilution maintaining the total ionic strengths...
The intrinsic viscosity, [η], and the Huggins constant, k , of a poly(acrylic acid) (PAA) sample have been measured at different degrees of neutralization, i, ranging from i=0.25 to i=1.00 and different ionic strengths,I , in the region 1.0 10 -4 M < I < 1.0 10 -1 M, using the isoionic dilution method in aqueous solutions. The results show that the variations...
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