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Synthesis of Hydroxy‐Functionalized Cyclic Olefin Copolymer and Its Block Copolymers with Semicrystalline Polyolefin Segments
Author(s) -
Song Xiangyang,
Yu Lijun,
Shiono Takeshi,
Hasan Tariqul,
Cai Zhengguo
Publication year - 2017
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.201600815
Subject(s) - copolymer , comonomer , polyolefin , polymer chemistry , materials science , norbornene , tacticity , crystallinity , post metallocene catalyst , olefin fiber , polymer , polyethylene , polypropylene , polymerization , metallocene , composite material , layer (electronics)
Synthesis of hydroxy‐functionalized cyclic olefin copolymer (COC) is achieved with remarkably high activity (up to 5.96 × 10 7 g‐polymer mol‐Ti −1 h −1 ) and controlled hydroxy group in a wide range (≈17.1 mol%) by using ansa ‐dimethylsilylene (fluorenyl)(amido)titanium complex. The catalyst also promotes living/controlled copolymerization to afford novel diblock copolymers consisting of hydroxy‐functionalized COC and semicrystalline polyolefin sequence such as polyethylene and syndiotactic polypropylene, where the glass transition temperature of the norbornene/10‐undecen‐1‐ol segment and each block length are controlled by comonomer composition and copolymerization time, respectively.