Rheological properties of electron beam-irradiated polypropylenes with different molar masses

被引：17
|
作者：
Auhl, Dietmar [1 ,2 ]
Stadler, Florian J. [1 ,3 ]
Muenstedt, Helmut [1 ]
机构：
[1] Univ Erlangen Nurnberg, Inst Polymer Mat, D-91058 Erlangen, Germany
[2] Catholic Univ Louvain, Inst Condensed Matter & Nanosci, B-1348 Louvain, Belgium
[3] Chonbuk Natl Univ, Sch Semicond & Chem Engn, Jeonju 561756, Jeonbuk, South Korea
来源：
RHEOLOGICA ACTA | 2012年 / 51卷 / 11-12期
关键词：
Polypropylene; Electron beam irradiation; Long-chain branching; Zero shear-rate viscosity; Elongational rheology; DENSITY POLYETHYLENE MELT; LONG-CHAIN BRANCHES; MOLECULAR-STRUCTURE; VISCOELASTIC PROPERTIES; ISOTACTIC POLYPROPYLENE; ELONGATIONAL BEHAVIOR; SHEAR DATA; VISCOSITY; DEPENDENCE; STRAIN;
D O I：
10.1007/s00397-012-0646-6
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Electron beam-irradiated polypropylene undergoes chain scission initiated by the loss of a proton. The resulting macroradicals can lead to branched molecules. However, the understanding of the influence of irradiation on the branching of polypropylene is still scarce. Therefore, this paper investigates structure-property relationships in such irradiated polymers. In general, irradiation yields long-chain branches, which develop from a star-like into a tree-like branching architecture with increasing dose. These conclusions can be drawn from the relation between the zero shear-rate viscosity eta (0) and the weight average molar mass M (w) as well as from the elongational behavior.
引用
收藏
页码：979 / 989
页数：11
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