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Synthesis of norbornene/divinylbenzene copolymers catalyzed by anilinonaphthoquinone‐ligated nickel complexes and their applications for the synthesis of graft polymers
Author(s) -
Chowdhury Samiul Islam,
Tanaka Ryo,
Nakayama Yuushou,
Shiono Takeshi
Publication year - 2020
Publication title -
journal of polymer science
Language(s) - English
Resource type - Journals
eISSN - 2642-4169
pISSN - 2642-4150
DOI - 10.1002/pol.20200133
Subject(s) - divinylbenzene , methylaluminoxane , copolymer , polymer chemistry , norbornene , nickel , chemistry , polymerization , catalysis , methyl methacrylate , styrene , azobisisobutyronitrile , polymer , organic chemistry , metallocene
The copolymerization of norbornene (NB) and divinylbenzene (DVB) was carried out using anilinonaphthoquinone‐ligated nickel complexes of the type [Ni(C 10 H 5 O 2 NAr)(Ph)(PPh 3 )] ( 1a : Ar = C 6 H 3 ‐2,6‐ i Pr; 1b : Ar = C 6 H 2 ‐2,4,6‐Me; 1c: Ar = C 6 H 5 ) with modified methylaluminoxane (MMAO) as a cocatalyst. The DVB content was varied (5–25 mol%) and the resulting copolymers exhibited number‐average molecular weights ( M n ) of 40,000–69,000 g/mol with polydispersities (PDI = 1.5–1.8). The styryl group of the NB/DVB copolymer was used for grafting poly(methyl methacrylate) by reverse atom transfer radical polymerization using azobisisobutyronitrile in the presence of copper chloride and bipyridine.