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Numerical description of shear viscosity functions of long-chain branched metallocene-catalyzed polyethylenes

✍ Scribed by Florian J. Stadler; Helmut Münstedt

Book ID
104024142
Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
757 KB
Volume
151
Category
Article
ISSN
0377-0257

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## Abstract The viscosity functions of long‐chain branched metallocene‐catalyzed ethene homopolymers and copolymers (LCB‐mPE) were described by an extended Carreau‐Yasuda model. The two characteristic relaxation times, __λ__~1~ and __λ__~2~, and the slope of the viscosity function between these two

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## Abstract **Summary:** Linear and long‐chain branched high‐density polyethylenes with a molar mass $\overline M \_{\rm w}$ between 1 700 and 1 150 000 g · mol^−1^ were synthesized using metallocene catalyst systems. Depending on the polymerization parameters the molar mass distribution reached va