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以钕系和镍系顺丁橡胶-甲苯体系为研究对象,用DV-II+pro编程控制式粘度计测定了胶液质量分数为8%～12%、温度为30～70℃下的表观粘度。结果表明:(1)在同一剪切速率(γ)下,钕系胶液的粘流活化能(ΔEη)小于镍系;且当γ大于30s-1后,ΔEη趋于恒定值,即钕系ΔEη=5.5kJ/mol,镍系ΔEη=6.8kJ/mol;(2)温度和浓度对钕系胶液的流动指数影响不显著,n≈0.77。胶液具有明显的剪切变稀特征,属于典型的假塑性流体;(3)对于钕系胶液,当胶液质量分数在8%～10%时,浓度效应指数β∈{4.497,4.882},属于浓溶液;当胶液质量分数大于10%后,β∈{7.239,7.498},胶液表现为熔体的性质,其临界浓度为10%(质量分数);镍系胶液在胶液质量分数为8%～12%时,β=5.645,胶液已具有熔体的性质。
The neodymium-based and nickel-based butadiene-styrene-toluene systems were studied with DV-II + pro programmed viscometer to determine the apparent viscosity at 8% ~ 12% and the temperature of 30 ~ 70 ℃ Viscosity. The results show that: (1) At the same shear rate (γ), the viscous flow activation energy (ΔEη) of neodymium glue is less than that of nickel; and when γ is greater than 30s-1, ΔEη tends to be constant, ΔEη = 5.5kJ / mol, and the nickel system ΔEη = 6.8kJ / mol. (2) The influence of temperature and concentration on the flow index of neodymium-based glue is not significant, n≈0.77. (3) For neodymium-based glue, the concentration effect index β ∈ {4.497, 4.882} when the glue mass fraction is between 8% and 10% , Which belongs to the concentrated solution. When the glue mass fraction is more than 10%, β ∈ {7.239, 7.498}, the glue shows the nature of the melt with the critical concentration of 10% (mass fraction) The mass fraction of 8% ~ 12%, β = 5.645, the glue has the nature of the melt.