The results of an extensive study of the intrinsic viscosity [η] of a series of linear, homogeneous (anionically prepared) polystyrenes (1.9 ∼106. Above this molecular weight the dependence of [η]/[η]0 on z is satisfactorily predicted by recent calculations of Fixman; [η]/[η]0 is not linear in z contrary to other recent suggestions. The failure of the data on lower molecular weight polymers to be a single‐valued function of z is discussed in terms of partial draining effects.

Thermodynamic and Conformational Properties of Polystyrene. II. Intrinsic Viscosity Studies on Dilute Solutions of Linear Polystyrenes

Viscosity – Molecular Weight Relationships and Unperturbed Dimensions of Linear Chain Molecules

The chain length dependence of mean-square radius of gyration ‹S2› for several polymers, stiff or flexible, in dilute solution is compared with that for the Kratky–Porod (KP) wormlike chain, using representative literature data. In the region of nK, the number of Kuhn’s statistical segments, below about 50, ‹S2› for all polymers examined is accurately described by Benoit–Doty’s expression for the KP chain. Upward deviations from this expression occur at nK of about 50, regardless of the chain stiffness. Thus, the critical chain length Lc for the onset of excluded-volume effect on the average dimensions of a polymer is approximately proportional to q, the persistence length of the polymer, with a proportionality factor of about 100. The value of Lc estimated from this relation is at least one order of magnitude larger than that predicted theoretically by Yamakawa and Stockmayer.

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Excluded-Volume Effects in Dilute Polymer Solutions. XIII. Effects of Chain Stiffness

The use of frictional coefficients to evaluate unperturbed dimensions in dilute polymer solutions

Elizabeth Cohn-Ginsberg

Papers

Properties of dilute polymer solutions IILight scattering and viscometric properties of solutions of conventional polymethyl methacrylate

A note on the universal calibration curve for gel permeation chromatography

Dilute solution properties of tactic polymethyl methacrylates I—Intrinsic viscosities of isotactic fractions

Dilute solution properties of tactic poly-(methyl methacrylates). ii. isotactic fractions in a theta solvent

Calibration of gel-permeation columns with unfractionated polymers