title: Stereogradient polymers by ruthenium-catalyzed stereospecific living radical copolymerization of two monomers with different stereospecificities and reactivities.
abstract: Stereogradient polymers, a fundamentally new type of polymers, were prepared by the stereospecific living radical copolymerization of two monomers that have different stereospecificities and reactivities. The ruthenium-catalyzed living radical copolymerization of 2-hydroxyethyl methacrylate (HEMA) and the silyl-capped HEMA [(tert-butyldimethylsilyl)-HEMA] (SiHEMA) in (CF3)2C(Ph)OH afforded stereogradient poly(HEMA), in which the rr content gradually increased from 62 to 77% at 0 degrees C, due to the lower reactivity and the higher syndiospecificity of SiHEMA.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Miura
authors.forename: Takuya
authors.initials: T
authors.lastname: Shibata
authors.forename: Kotaro
authors.initials: K
authors.lastname: Satoh
authors.forename: Masami
authors.initials: M
authors.lastname: Kamigaito
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Okamoto