Dilute solution properties of polyoctene‐1. Analysis by the kurata‐stockmayer method

Abstract

SynopsisDilute solution properties of polyoctenel have been measured by light scattering, mmometry, and viscometry and Mark-Houwink expressions determined in two thermodynamically good solvents and one solvent at the Flory (8) temperature. The data have been interrelated and analyzed by the Kurata-Stockmayer technique and are shown to have good correspondence with the theory in some cmea and moderately poor in others.However, the data are not sufficiently precise to permit all aspects of the adequacy of such a two-parameter theory to be judged. EXPERIMENTALThe sample of polyoctene-1 was generously provided by Union Carbide Chemicals Company and was prepared with a Ziegler-type catalyst.When received, the sample was a yellow, tacky, rubbery material. PnrifIeation and FractionationBefore prepurification of the bulk polymer, one fractionation was performed by the standard technique of solventnonsolvent pair (cyclohexane-acetone, respectively) precipitation at constant temperature 3963

Random coil dimensions of poly(1‐hexadecene)

“…[q] = Ka .MI/* -a3 (2) with K, = a0 * ((r$)/M)3'2. The expansion factor, a, is an increasing function of the excluded volume parameter, which vanishes for short chains.…”