TIME-RESOLVED EXPERIMENTAL-STUDY OF SHEAR VISCOSITY IN THE COURSE OF SPINODAL DEMIXING

被引:22
作者
EMANUELE, A [1 ]
PALMAVITTORELLI, MB [1 ]
机构
[1] CNR,INST INTERDISCIPLINARY APPLICAT PHYS,I-90123 PALERMO,ITALY
关键词
D O I
10.1103/PhysRevLett.69.81
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A large transient surge of shear viscosity is observed in the course of spinodal demixing caused by off-critical quenching of a polymer solution. A characteristic length is derived from light scattering measurements along with a related relaxation time tau(M) whose value agrees with previous independent experiments. Viscosity peak values plotted versus S-tau(M) (where S is the shear rate) lie on a master curve of the type (S-tau(M))-p, where p almost-equal-to 2. This scaling procedure helps bring into focus the mechanism responsible for the novel observation.
引用
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页码:81 / 84
页数:4
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