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Synthesis and Characterization of Novel Ethene‐ graft ‐Ethene/Propene Copolymers
Author(s) -
Arikan Burçak,
Stadler Florian J.,
Kaschta Joachim,
Münstedt Helmut,
Kaminsky Walter
Publication year - 2007
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200700161
Subject(s) - propene , macromonomer , polymer chemistry , copolymer , materials science , polyethylene , rheology , steric effects , activation energy , chemistry , polymer , organic chemistry , catalysis , composite material
The synthesis of ethene/propene macromers with a high amount of sterically unhindered vinyl groups is described. These macromers are incorporated as long‐chain branches into polyethylene (PE). The remaining low molecular fractions were removed by Soxhlet extraction. Up to 60 wt.‐% macromer was included, which leads to comb‐like molecular topographies that distinctly affect the rheological behavior. The thermal activation energy increased significantly and the zero shear‐rate viscosity enhancement factor η 0 / η 0 linwas also changed noticeably.