丁二烯-苯乙烯嵌段共聚物溶液粘度的测定和研究

MEASUREMENT AND INVESTIGATION ON SBS BLOCK COPOLYMER SOLUTION VISCOSITY

采用 NEX- 1型锥板粘度计和 HAAK- 10 0型锥板粘度计测定了丁二烯 -苯乙烯嵌段共聚物 (SBS)两种型号 SBS140 1和 SBS4 4 0 2的环己烷溶液和甲苯溶液的粘度 ,温度范围为 2 0℃～ 60℃ ,浓度范围为1%～ 2 5 %。研究了各种因素对溶液粘度的影响 ,并计算出了运动粘度。 8%以下溶液呈现牛顿流体的性质 ,粘度基本不随剪切速率改变。浓度从 10 %起 ,溶液呈现出非牛顿性 ,粘度随剪切速率呈幂率变化 ,粘流活化能随剪切速率的增加而增高。在本文的测量范围内 ,绝对粘度与浓度呈三次多项式的关系 。

The viscosity of SBS1401 and SBS4402 cyclohexane solution and methylbenzen solution were measured in different temperature while concentration changing from 1% to 25% . The results show that under 8% , SBS1401 and SBS4402 solutions fit into the properties of Newton liquid, the viscosity ( η ) almost do not change with the rate of shear ( γ ). After 10% , solutions fit into Non Newton behavior. Viscosity decreases, and viscosity flow activation energy (Δ E η ) increases when γ increase.