Pseudo-living copolymerization of norbornene and ω-alkenylborane – Synthesis of monodisperse functionalized cycloolefin copolymer. (15th January 2015)

• Record Type: Journal Article
• Authors: Tanaka, Ryo; Ikeda, Tomomi; Nakayama, Yuushou; Shiono, Takeshi
• Is Part Of: Polymer. Volume 56(2015)
• Page Start: 218
• Page End: 222
• Publication Date: 2015-01-15
• Subjects: Cyclic olefin copolymer -- Norbornene -- Post-functionalization; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2014.11.059
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: The synthesis of norbornene copolymer with hydroxy groups was performed by the copolymerization of norbornene (NB) with 9-(7-octenyl)-borabicyclo[3.3.1]nonane (OctBBN) using ansa -dimethylsilyl(fluorenyl)(amido)titanium catalyst (1 ) activated by Ph3 CB(C6 F5 )4 and successive oxidation. The glass transition temperature ( T g ) of the copolymer was higher than the polymer with the same hydroxy group content synthesized by the copolymerization of NB and ω-alkenylaluminum. The 13 C NMR spectrum of the copolymer clearly showed that alkylborane moiety was converted quantitatively to hydroxy groups. Copolymerization of NB and OctBBN by the1 -MMAO/BHT system proceeded in a pseudo-living manner without chain transfer reaction. Graphical abstract: