钕系顺丁橡胶-甲苯溶液的表观黏度及流动参数

Apparent viscosity and fluid parameters of neodymium based cis-1,4-polybutadiene rubber catalyzed in toluene solution

以中国石油独山子石化公司研究院中试装置生产的钕系顺丁橡胶(NdBR)为胶样,以甲苯为溶剂,制备了NdBR-甲苯溶液,研究了胶液的质量分数(C)、温度(T)和剪切速率(γ)3个因素对胶液表观黏度(η)的影响,并采用外推法考察了胶液的流体常数(a)和零剪切黏度(η0)。结果表明,3个因素对η的影响顺序为:C≥γ≈T;在C分别为8.00%～10.00%的低浓度区和10.00%～12.00%高浓度区,其对应的γ分别为4.40～25.00 s-1和0.88～15.00 s-1时,η的回归方程分别为:lnη=0.815 2+3.533 5 ln C+13.405 4/T-0.210 8 lnγ和lnη=-6.593 7+6.751 9 ln C+13.466 9/T-0.212 0 lnγ;2个回归方程的适用T均为30～70℃。a=0.000 635;η0的经验方程为lnη0=-5.674 2+6.464 4 ln C+12.289 2/T,影响胶液η0因素的顺序为:C≥T。

The neodymium based cis-1,4-polybutadiene rubber catalyzed（NdBR）-toluene solution was prepared.The effects of the three factors of mass fraction of NdBR rubber in toluene（C）,temperature（T） and shear rate（γ） on the apparent viscosity（η） of the rubber solution were studied,and the fluid constant（a） and zero shear viscosity（η0） were examined by extrapolation method.The results showed that the influence sequence of the three factors on η was C≥γ≈T.The regression equation were ln η=0.815 2＋3.533 5 ln C＋13.405 4/T-0.210 8 ln γ at C of 8.00%-10.00%,γ of 4.40-25.00 s-1;and ln η=-6.593 7＋6.751 9 ln C＋13.466 9/T-0.212 0 ln γ at C of 10.00%-12.00%,γ of 0.88-15.00 s-1.The appropriate T of the two regression equation were all 30-70 ℃.The a=0.000 635,and the empirical equations of η0 was ln η0=-5.674 2＋6.464 4 ln C＋12.289 2/T,and the sequence of influencing η0 for the two factors was C≥T.