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Dynamic viscoelastic properties of dilute polymer solutions

1967; Wiley; Volume: 15; Issue: 1 Linguagem: Inglês

10.1002/polc.5070150126

1935-3065

Hidejirō Tanaka, Akio Sakanishi, Motozo Kaneko, Jiro Furuichi,

Material Dynamics and Properties

Abstract The intrinsic rigidities and the dynamic intrinsic viscosities have been determined from the high‐frequency measurements of viscoelastic properties of dilute solutions in which polymer molecules possess different conformations. Corresponding to them, the limiting relaxation times have been obtained from the steady‐flow viscosity measurements of the same solutions. Data are quantitatively compared with the molecular theories of viscoelasticities of dilute polymer solutions through normalized dispersion curves. Results for polyisobutylene in benzene at theta temperature agree with the Zimm theory (nondraining case) and in cyclohexane (good solvent) are intermediate between the House and the Zimm theory (partially freedraining). It appears that draining effects have some correlation with excluded volume effects. Concentration dependence of complex rigidities also shows correlation with chain expansion, and this phenomenon is due to interchain interaction. Results for poly‐γ‐methyl‐ D ‐glutamate and poly‐γ‐benzyl‐ I ‐glutamate in helix solvents show qualitative agreement with the Kirkwood‐Auer theory for rodlike polymers. Preliminary observations for D,L‐copoly‐γ‐bennyl glutamate in dioxane indicate some difference from the above results.