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Influence of Copolymerization on Fragmentation Behavior Using Ziegler‐Natta Catalysts
Author(s) -
Zheng Xuejing,
Pimplapure Makarand S.,
Weickert Günter,
Loos Joachim
Publication year - 2006
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.200500664
Subject(s) - comonomer , copolymer , natta , catalysis , polymer , ziegler–natta catalyst , ethylene , materials science , polymerization , polymer chemistry , fragmentation (computing) , morphology (biology) , ethylene propylene rubber , chemical engineering , chemistry , composite material , organic chemistry , geology , engineering , computer science , operating system , paleontology
Summary: A morphological investigation was carried out on different Ziegler‐Natta catalysts during the early stages of propylene homo‐ and propylene‐ethylene copolymerization. For similar polymerization conditions, but dependent on the nature of the catalysts, fragmentation occurs layer‐by‐layer or instantaneously into a large amount of small pieces. However, the incorporation of comonomer ethylene slows down the fragmentation progress. This is believed to be the result of the higher mobility of the just formed propylene‐ethylene copolymer molecules at the active sites.SEM images of the cross‐sectional morphology of polymer particles from catalyst‐I.