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Synthesis of polypropene‐ block ‐poly(ethylene‐ co ‐propene) by short‐period polymerization with MgCl 2 ‐supported Ziegler catalyst
Author(s) -
Mori Hideharu,
Yamahiro Mikio,
Tashino Kunihiko,
Ohnishi Kouki,
Nitta Kohhei,
Terano Minoru
Publication year - 1995
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.1995.030160403
Subject(s) - propene , copolymer , polymer chemistry , ethylene , polymerization , gel permeation chromatography , materials science , catalysis , polymer , chemistry , organic chemistry , composite material
The short‐period polymerization method was successfully applied to the synthesis of a novel diblock copolymer, polypropene‐ block ‐poly(ethylene‐ co ‐propene). The polymerization was carried out for ca. 0,1 s with a MgCl 2 ‐supported Ziegler catalyst. The copolymers obtained showed unimodal curves in gel‐permeation chromatography without any peak in the low‐molecular‐weight region. After extraction with heptane, the fraction of poly(ethylene‐ co ‐propene) remained unchanged in the copolymer but disappeared in a commercial so‐called block‐type copolymer. All the results the formation of polypropene‐ block ‐poly(ethylene‐ co ‐propene), in which poly(ethylene‐ co ‐propene) is chemically linked with polypropene.