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Star Poly(methyl Methacrylate) with End-functionalized Arm Chains by Ruthenium-catalyzed Living Radical Polymerization by Kyung-Youl Baek; Masami Kamigaito; Mitsuo Sawamoto is a Materials Science article available to read on EtoBox.

What is Star Poly(methyl Methacrylate) with End-functionalized Arm Chains by Ruthenium-catalyzed Living Radical Polymerization about?

## Abstract Star polymers with end‐functionalized arm chains (surface‐functionalized star polymers) were synthesized by the __in situ__ linking reaction between ethylene glycol dimethacrylate (linking agent) and an α‐end‐functionalized linear living poly(methyl methacrylate) in RuCl~2~(PPh~3~)~3~‐catalyzed living radical polymerization; the terminal on the surface functionalities included amides, alcohols, amines, and esters. The star polymers were obtained in high yields (75–90%) with initiating systems consisting of a functionalized 2‐chloro‐2‐phenylacetate or ‐acetamide [__F__C(O)CHPhCl; __F__ = __n__PrNH, HOCH~2~CH~2~O, Me~2~NCH~2~CH~2~O, or EtO; initiator] and __n__‐Bu~3~N (additive). The yield was lower with a functionalized 2‐bromoisobutyrate [Me~2~NCH~2~CH~2~OC(O)CMe~2~Br] initiator or with Al(O__i__‐Pr)~3~ as an additive. Multi‐angle laser light scattering analysis showed that the star polymers had arm numbers of 10–100, radii of gyration of 6–23 nm, and weight‐average molecular weights of 1.3 × 10^5^ to 3.0 × 10^6^, which could be controlled by the molar ratio of the linking agent to the linear living polymers. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym

Who reads Star Poly(methyl Methacrylate) with End-functionalized Arm Chains by Ruthenium-catalyzed Living Radical Polymerization?

Author

Kyung-Youl Baek; Masami Kamigaito; Mitsuo Sawamoto

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-624X)

Published

2002

Language

EN

Field

Materials Science (Physical Sciences)