6本の枝をもつ星形ポリスチレンとその濃厚溶液の粘弾性的性質

概要

論文の詳細を見る
The viscoelastic properties of star-shaped polystyrenes having six branches and their solutions were measured and compared with those of four-branch and liner polystyrenes. The dependence of the rheological parameters, such as zero-shear viscosity η_0 and steady-state compliance J_e^0, on the molecular weight and concentration were discussed. At a constant molecular weight, η_0 decreases with increasing number of branches in the polymer molecule. Molecular weight dependence of η_0 for branched polystyrenes having a constant molecular weight of branch, is very similar to that for comb-shaped and randomly branched polystyrenes. J_e^0 clearly depends on the molecular weight even in the entanglement region, and the critical concentration evaluated from J_e^0 is two times higher than that from η_0 for branched polystyrenes.
社団法人日本材料学会の論文
1973-05-15