The Solution Properties of Poly-o-methylstyrene

概要

論文の詳細を見る
The solution properties of poly-o-methylstyrene in toluene were measured by the light-scattering and viscosity methods, and the results were compared with those obtained from poly-o-chlorostyrene and other polystyrene derivatives. The dependencies of the intrinsic viscosity, the second virial coefficient, and the end-to-end distance of the polymer chain on the molecular weight are as follows: & [η]=9.22×10^-5·M_w^0.72(dl/g), A_2=3.89×10^-2·M_w^-0.38 (mol·cc/g^2) & and 〈L^2〉^1/2=0.197×M_w^0.62 (Å). It was made clear that the unperturbed dimension of poly-o-methylstyrene was larger than that of poly-p-methylstyrene, and that the cause of this difference is the large steric repulsion between the side groups of the former. Moreover, the unperturbed dimension of poly-o-methylstyrene was smaller than that of poly-o-chlorostyrene. From these results, it is considered that the large extension of poly-o-chlorostyrene was affected by the electrostatic repulsion between the side groups.
公益社団法人日本化学会の論文