摘要
本文对0.1mol·kg ̄(-1)的海藻酸钠的Cu ̄(2+)添加体系的相对粘度(η_rel)、固有粘度[η]的变化规律进行了考查,得到了sol-gel相转移临界点附近的相对粘度的临界指数k=0.96,固有粘度的临界指数k'=0.24.Huggins方程中的粘性常数k'比线性高分子要大,由此证实了该体系的凝胶行为同3D-percolation理论中的Zimm簇型的假设相吻合.
The critical behavior of the relative viscosity(η_(rel))and the intrinsic viscosity [η]near the sol-gel transition point was experimentally studied for alginate solutions.The criti-cal exponent of the relative vicosity k=0. 96.This is in good agreement with the predictions ofpercolation theory. The ctitical exponent of the intrinsic viscosity k'=0.24 .The weak divergence of [η]re-sembles the critical behavior of Zimm clusters predicted by 3D-percolation theory.
出处
《河南师范大学学报(自然科学版)》
CAS
CSCD
1994年第4期57-62,共6页
Journal of Henan Normal University(Natural Science Edition)
基金
河南省教委资助课题
关键词
海藻酸钠
相对粘度
固有粘度
临界指数
相转移
sodium alginate
relative viscosity
intrinsic viscosity
critical exponent
pereolation