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Polymacromonomers with polyolefin branches synthesized by free‐radical homopolymerization of polyolefin macromonomer with a methacryloyl end group
Author(s) -
Kaneko Hideyuki,
Kojoh Shinichi,
Kawahara Nobuo,
Matsuo Shingo,
Matsugi Tomoaki,
Kashiwa Norio
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200450930
Subject(s) - polyolefin , macromonomer , polymer chemistry , end group , polymerization , radical polymerization , copolymer , materials science , gel permeation chromatography , radical initiator , polymer , chemistry , composite material , layer (electronics)
Polymacromonomers with polyolefin branches were successfully synthesized by free‐radical homopolymerization of polyolefin macromonomer with a methacryloyl end group. Propylene‐ethylene random copolymer (PER) with a vinylidene end group was prepared by polymerization using a metallocene catalyst. Then, the unsaturated end group was converted to a hydroxy end group via hydroalumination and oxidation. The PER with the hydroxy end group was easily reacted with methacryloyl chloride to produce methacryloyl‐terminated PER (PER macromonomer; PERM). The free‐radical polymerization of thus‐obtained PERM was done using 2,2′‐azobis(isobutyronitorile) (AIBN) as a free‐radical initiator. From NMR analyses, the obtained polymers were identified as poly(PERM). Based on gel permeation chromatography (GPC), the estimated degree of polymerization ( D p ) of these polymers were about 30. Thus, new class of polymacromonomers with polyolefin branches was synthesized.