聚1-丁烯釜内合金的流变性能

Melts Rheological Behaviors of Poly( 1-Butene) Alloy Within Reactor

采用恒速双筒毛细管流变仪研究了聚1-丁烯釜内合金的流变性能并将其与高全同聚1-丁烯(iPB)的流变性能进行了比较。结果表明,所合成的釜内合金熔体是一种假塑性流体,且随着测试温度的升高其非牛顿指数变大,非牛顿性减小。在相同温度和剪切速率下,釜内合金的粘流活化能小于iPB的粘流活化能;随剪切速率的升高,粘流活化能减小,其粘温敏感性降低。

The rheological properties of poly （1-butene） alloy within reactor were studied by double capillary rheometer. The results show that the alloy within reactor is a kind of pseudoplastic fluid with the non-Newtonian index less than 1. Its non-Newtonian index becomes larger with the temperature increasing. 71a of alloy within reactor decreases from 320 Pa·s to 83 Pa·s while the temperature increases from 160℃ to 200℃ under 7 of 1000 s^-1. The activation energy of the alloy within reactor is smaller than that of iPB at the same temperature. The activation energy decreases with the increase of sharing rate, which means that the temperature dependence of the viscosity decreases. With shearing rate increasing, the elastic energy storage increases. The entrance pressure decreases with the temperature, implying that the morphology stability of alloy-A is better.