Solvent-controlled formation of star-like nanogels via dynamic covalent exchange of PSt- b -PMMA diblock copolymers with alkoxyamine units in the side Chain

Yoshifumi Amamoto; Moriya Kikuchi; Hideyuki Otsuka; Atsushi Takahara

doi:10.1021/ma100276n

Solvent-controlled formation of star-like nanogels via dynamic covalent exchange of PSt- b -PMMA diblock copolymers with alkoxyamine units in the side Chain

Yoshifumi Amamoto, Moriya Kikuchi, Hideyuki Otsuka, Atsushi Takahara

Department of Applied Molecular Chemistry

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

Solvent-controlled formation of star-like nanogels via a dynamic covalent exchange reaction of Polystyrene-b-poly(methyl methacrylate) (PSt-b-PMMA) diblock copolymers with alkoxyamine units in the PMMA block was shown. Diblock copolymers, consisting of PSt blocks and PMMA blocks with cross-linkable alkoxyamine units, were synthesized by ATRP techniques. The results show that a dynamic covalent exchange among alkoxyamine units in the polymer side chains makes it possible to form cross-linking structures from linear polymers. The molecular weights and sizes of the star-like nanogels are found to depend on their reaction time, the mixing ratio of two types of diblock copolymers, and reaction concentrations. The results also show that the sizes of star-like nanogels are different, and the diameter and height values in decalin are more than triple than those in anisole.

Original language	English
Pages (from-to)	5470-5473
Number of pages	4
Journal	Macromolecules
Volume	43
Issue number	12
DOIs	https://doi.org/10.1021/ma100276n
Publication status	Published - Jun 22 2010

All Science Journal Classification (ASJC) codes

Materials Chemistry
Polymers and Plastics
Inorganic Chemistry
Organic Chemistry

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title = "Solvent-controlled formation of star-like nanogels via dynamic covalent exchange of PSt- b -PMMA diblock copolymers with alkoxyamine units in the side Chain",

abstract = "Solvent-controlled formation of star-like nanogels via a dynamic covalent exchange reaction of Polystyrene-b-poly(methyl methacrylate) (PSt-b-PMMA) diblock copolymers with alkoxyamine units in the PMMA block was shown. Diblock copolymers, consisting of PSt blocks and PMMA blocks with cross-linkable alkoxyamine units, were synthesized by ATRP techniques. The results show that a dynamic covalent exchange among alkoxyamine units in the polymer side chains makes it possible to form cross-linking structures from linear polymers. The molecular weights and sizes of the star-like nanogels are found to depend on their reaction time, the mixing ratio of two types of diblock copolymers, and reaction concentrations. The results also show that the sizes of star-like nanogels are different, and the diameter and height values in decalin are more than triple than those in anisole.",

author = "Yoshifumi Amamoto and Moriya Kikuchi and Hideyuki Otsuka and Atsushi Takahara",

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AU - Amamoto, Yoshifumi

AU - Kikuchi, Moriya

AU - Otsuka, Hideyuki

AU - Takahara, Atsushi

PY - 2010/6/22

Y1 - 2010/6/22

N2 - Solvent-controlled formation of star-like nanogels via a dynamic covalent exchange reaction of Polystyrene-b-poly(methyl methacrylate) (PSt-b-PMMA) diblock copolymers with alkoxyamine units in the PMMA block was shown. Diblock copolymers, consisting of PSt blocks and PMMA blocks with cross-linkable alkoxyamine units, were synthesized by ATRP techniques. The results show that a dynamic covalent exchange among alkoxyamine units in the polymer side chains makes it possible to form cross-linking structures from linear polymers. The molecular weights and sizes of the star-like nanogels are found to depend on their reaction time, the mixing ratio of two types of diblock copolymers, and reaction concentrations. The results also show that the sizes of star-like nanogels are different, and the diameter and height values in decalin are more than triple than those in anisole.

AB - Solvent-controlled formation of star-like nanogels via a dynamic covalent exchange reaction of Polystyrene-b-poly(methyl methacrylate) (PSt-b-PMMA) diblock copolymers with alkoxyamine units in the PMMA block was shown. Diblock copolymers, consisting of PSt blocks and PMMA blocks with cross-linkable alkoxyamine units, were synthesized by ATRP techniques. The results show that a dynamic covalent exchange among alkoxyamine units in the polymer side chains makes it possible to form cross-linking structures from linear polymers. The molecular weights and sizes of the star-like nanogels are found to depend on their reaction time, the mixing ratio of two types of diblock copolymers, and reaction concentrations. The results also show that the sizes of star-like nanogels are different, and the diameter and height values in decalin are more than triple than those in anisole.

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Solvent-controlled formation of star-like nanogels via dynamic covalent exchange of PSt- b -PMMA diblock copolymers with alkoxyamine units in the side Chain

Abstract

All Science Journal Classification (ASJC) codes

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