HYDRODYNAMIC AND DYNAMIC OPTICAL-PROPERTI ES OF CHLOROFORM SOLUTIONS OF COMPLEXES BASED ON POLYELECTROLYTES AND SURFACTANTS

Citation
Av. Lezov et al., HYDRODYNAMIC AND DYNAMIC OPTICAL-PROPERTI ES OF CHLOROFORM SOLUTIONS OF COMPLEXES BASED ON POLYELECTROLYTES AND SURFACTANTS, Vysokomolekularnye soedinenia. Seria A, 37(11), 1995, pp. 1904-1909
Citations number
11
Categorie Soggetti
Polymer Sciences
ISSN journal
05075475
Volume
37
Issue
11
Year of publication
1995
Pages
1904 - 1909
Database
ISI
SICI code
0507-5475(1995)37:11<1904:HADOEO>2.0.ZU;2-9
Abstract
Hydrodynamic and dynamic optical properties of dilute chloroform solut ions of polymer complexes composed of poly(N-ethyl 4-vinyl pyridinium) cations and dodecyl sulfate and bromine anions were studied. Bromine and dodecyl sulfate ions were found to be bound to the chain of polyca tion. Coefficient of translational friction W, intrinsic viscosity [et a], and optical shear coefficient were shown to be controlled by the f ractional content phi of dodecyl sulfate ions bound to the molecular c hains of polycomplexes (degree of polymerization, 3000). With a decrea se in phi from 1 to 0.55, a concomitant decrease in [eta] and W as wel l as a decrease in the absolute values of negative optical anisotropy of the segments in polycomplexes may be rationalized by an increase in equilibrium rigidity of the macromolecules. The changes in compactnes s of the macromolecules of a polycomplex, when the composition of poly complex was varied, were shown to be primarily associated with the dif ference in molecular sizes of bromine and dodecyl sulfate anions, whic h hinder the rotation about chain bonds in a way similar to that obser ved in flexible-chain comblike copolymers with a random distribution o f components.