Rheology of long‐chain branched polypropylene copolymers
Rheology of long‐chain branched polypropylene copolymers
复制标题
DOI：
10.1002/app.38076
复制
发表时间：
2013-01
影响因子：
3
通讯作者：
F. Zulli;L. Andreozzi;E. Passaglia;S. Augier;M. Giordano
中科院分区：
文献类型：
--
作者：
F. Zulli;L. Andreozzi;E. Passaglia;S. Augier;M. Giordano
在这项工作中，我们提供了更多的洞察官能化的聚丙烯共聚物的流变性能与改性的结构，这是起源于长链支化。根据文献模型，通过对实验数据的数值拟合，定量地估算了平均分支间距和长链支点的裂隙，并用Carreau-Yasuda模型和Cole-Cole图分析了试件的粘弹性响应。这些分析使我们能够根据样品的原料组成来区分样品的粘弹性行为。此外，我们还突出了PP聚合物的粘度、长链支化度、支化点之间的距离与官能化程度之间的直接关系。2012年威利期刊公司J.应用。波兰姆。SCI。127：1423-1432,2013
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 frac- tion of long-chain branch points has been carried out quantitatively, by numerical fitting of experimental data according to a litera- ture 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. More- over, we were able to highlight direct correlations between viscosity, long-chain branching level, distance between branching points and functionalization degrees of PP polymers. V C 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 127: 1423-1432, 2013