title: New Strategy Targeting Well-Defined Polymethylene-block-Polystyrene Copolymers: The Combination of Living Polymerization of Ylides and Atom Transfer Radical Polymerization.
abstract: Well-defined polymethylene-block-polystyrene (PM-b-PS) diblock copolymers were synthesized via a combination of living polymerization of ylides and atom transfer radical polymerization (ATRP) of styrene. A series of hydroxyl-terminated polymethylenes (PM-OHs) with different molecular weight and narrow molecular weight distribution were prepared using living polymerization of ylides following efficient oxidation in a quantitive functionality. Then, the macroinitiators (PM-MIs ($\overline M _{\rm n}$ = 1 900-15 000; PDI = 1.12-1.23)) transformed from PM-OHs in ≈ 100% conversion initiated ATRPs of styrene to construct PM-b-PS copolymers. The GPC traces indicated the successful extension of PS segment ($\overline M _{\rm n}$ of PM-b-PS = 5 000-41 800; PDI = 1.08-1.23). Such copolymers were characterized by (1) H NMR and DSC.
authors.affiliation: Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P.R. China; Department of Chemistry, Zhengzhou University, Zhengzhou 450052, P.R. China.
authors.forename: Jian-Zhuang
authors.initials: JZ
authors.lastname: Chen
authors.forename: Kun
authors.initials: K
authors.lastname: Cui
authors.forename: Shu-Yuan
authors.initials: SY
authors.lastname: Zhang
authors.forename: Peng
authors.initials: P
authors.lastname: Xie
authors.forename: Qiao-Ling
authors.initials: QL
authors.lastname: Zhao
authors.forename: Jin
authors.initials: J
authors.lastname: Huang
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Shi
authors.forename: Guang-Yu
authors.initials: GY
authors.lastname: Li
authors.forename: Zhi
authors.initials: Z
authors.lastname: Ma