A hierarchical multi-mode MSF model for long-chain branched polymer melts part II: multiaxial extensional flows

被引：18
|
作者：
Narimissa, Esmaeil [1 ]
Rolon-Garrido, Victor H. [1 ]
Wagner, Manfred H. [1 ]
机构：
[1] Berlin Inst Technol TU Berlin, Polymer Engn Polymer Phys, Fasanenstr 90, D-10623 Berlin, Germany
来源：
RHEOLOGICA ACTA | 2016年 / 55卷 / 04期
关键词：
Molecular stress function model; Biaxial flow; Multiaxial extensional flow; Polyethylene; Polymer melt; Elongational flow; BIAXIAL EXTENSION; ELONGATIONAL FLOW; STRESS-RELAXATION; ENTANGLED POLYMER; STRAIN RATE; VISCOSITY; PLANAR; SHEAR; POLYPROPYLENE; POLYSTYRENE;
D O I：
10.1007/s00397-016-0922-y
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In part I, a novel hierarchical multi-mode molecular stress function (HMMSF) model for long-chain branched (LCB) polymer melts has been proposed, which implements the basic ideas of (i) the pom-pom model, (ii) hierarchal relaxation, (iii) dynamic dilution, and (iv) interchain pressure. Here, the capability of this approach is demonstrated in modelling the extensional viscosity data of a broadly distributed long-chain branched polymer melt in uniaxial, equibiaxial, and planar extensional deformations with only a single non-linear parameter, the dilution modulus, which quantifies the fraction of dynamically diluted chain segments.
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页码：327 / 333
页数：7
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