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首页> 外文期刊>Journal of Applied Polymer Science >Rheology of long-chain branched polypropylene copolymers
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Rheology of long-chain branched polypropylene copolymers

机译：长支链聚丙烯共聚物的流变学

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摘要

In this work, we provide more insight into the rheological properties of functionalized polypropylene copolymers with modified architectures, which originate long-chain branching. The evaluation of the average distance between branches and the fraction of long-chain branch points has been carried out quantitatively, by numerical fitting of experimental data according to a literature model, and the viscoelastic response of the samples has been analyzed in terms of a Carreau-Yasuda-like model and Cole-Cole plots. These analyses allowed us to discriminate the viscoelastic behavior of the samples on the basis of their feed composition. Moreover, we were able to highlight direct correlations between viscosity, long-chain branching level, distance between branching points and functionalization degrees of PP polymers.
机译：在这项工作中，我们提供了更多有关具有改性结构的官能化聚丙烯共聚物的流变性能的信息，这些结构源自长链支化。根据文献模型，通过对实验数据进行数值拟合，对分支之间的平均距离和长链分支点的分数进行了定量评估，并对样品的粘弹性响应进行了分析。 -Yasuda式模型和Cole-Cole图。这些分析使我们能够根据进料组成来区分样品的粘弹性行为。此外，我们能够突出显示PP聚合物的粘度，长链支化水平，支化点之间的距离和官能化程度之间的直接相关性。

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