摘要
本工作用日本岩本ＲＰＸ－７０５多功能流变仪测定了在不同浓度、温度、溶剂ｐＨ值和外加盐浓度对壳聚糖在甲酸水溶液中其浓溶液粘度η随剪切速率γ的变化关系．讨论了浓度、温度等对溶液粘度、流动活化能Ｅ_γ和流动指数ｎ的影响．发现溶剂ｐＨ值减小或溶液中外加盐浓度增加，溶液粘度变小，ｎ增大，表明非牛顿流动性减弱，并且进一步讨论了零剪切粘度η_０和外加盐浓度Ｃ_ｓ的依赖关系．
he viscosity and flow behavior of the concentrated solutions in the formic acid aqueous solution have been studied by using RPX -705 Rheopexy Analyzer under various concentration (1--5g. 100ml ), temperature (25 -45℃ ), pH of solvent (0.63 -2. 16 ) and ionic strength (0. 04 -0.4mol·1￣-1 NaCl salt). It was discussed that the flow index n and flow activation energy E_r change with polymer concentration and temperature .It has been observed that zero shear viscosity de creases with increasing ionic strength and decreasing pH of solvent.
出处
《高分子学报》
CSCD
北大核心
1994年第3期328-334,共7页
Acta Polymerica Sinica
基金
国家自然科学基金
关键词
聚电解质
壳聚糖
流变性
粘度
Polyelectrolyte
The concentrated solution of chitosan
Rheological properties
