Use of stable free radicals for the sequential preparation and surface grafting of functionalized macroporous monoliths

Ulrika Meyer; Frantisek Svec; Jean M.J. Fréchet; Craig J. Hawker; Knut Irgum

doi:10.1021/ma000797e

Use of stable free radicals for the sequential preparation and surface grafting of functionalized macroporous monoliths

Ulrika Meyer, Frantisek Svec, Jean M.J. Fréchet, Craig J. Hawker, Knut Irgum

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

90 Scopus citations

Abstract

Porous polymer monoliths have been prepared by polymerization of styrene and divinyl-benzene in the presence of porogenic solvents initiated by 2,2,5-trimethyl-3-(1-phenylethoxy)-4-phenyl-3-azahexane. Although the polymerization reaction initiated by this alkoxyamine initiator is slower than that initiated by typical free-radical initiators, almost complete conversions were obtained at temperatures of 95 and 110°C. The porous properties of the monolithic materials were easily controlled in a broad range by adjusting the composition of the porogenic solvents in the polymerization mixture. The capped radicals located at the surface of the pores of the monolith were used for subsequent grafting of functionalized linear chains from monomers such as tert-butyl methacrylate, chloromethylstyrene, or vinylpyridine at 110°C. The extent of grafting within the pores could be controlled by adjusting the reaction time or diluting the monomer with an inert solvent.

Original language	English (US)
Pages (from-to)	7769-7775
Number of pages	7
Journal	Macromolecules
Volume	33
Issue number	21
DOIs	https://doi.org/10.1021/ma000797e
State	Published - Oct 2000
Externally published	Yes

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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abstract = "Porous polymer monoliths have been prepared by polymerization of styrene and divinyl-benzene in the presence of porogenic solvents initiated by 2,2,5-trimethyl-3-(1-phenylethoxy)-4-phenyl-3-azahexane. Although the polymerization reaction initiated by this alkoxyamine initiator is slower than that initiated by typical free-radical initiators, almost complete conversions were obtained at temperatures of 95 and 110°C. The porous properties of the monolithic materials were easily controlled in a broad range by adjusting the composition of the porogenic solvents in the polymerization mixture. The capped radicals located at the surface of the pores of the monolith were used for subsequent grafting of functionalized linear chains from monomers such as tert-butyl methacrylate, chloromethylstyrene, or vinylpyridine at 110°C. The extent of grafting within the pores could be controlled by adjusting the reaction time or diluting the monomer with an inert solvent.",

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T1 - Use of stable free radicals for the sequential preparation and surface grafting of functionalized macroporous monoliths

AU - Meyer, Ulrika

AU - Svec, Frantisek

AU - Fréchet, Jean M.J.

AU - Hawker, Craig J.

AU - Irgum, Knut

PY - 2000/10

Y1 - 2000/10

N2 - Porous polymer monoliths have been prepared by polymerization of styrene and divinyl-benzene in the presence of porogenic solvents initiated by 2,2,5-trimethyl-3-(1-phenylethoxy)-4-phenyl-3-azahexane. Although the polymerization reaction initiated by this alkoxyamine initiator is slower than that initiated by typical free-radical initiators, almost complete conversions were obtained at temperatures of 95 and 110°C. The porous properties of the monolithic materials were easily controlled in a broad range by adjusting the composition of the porogenic solvents in the polymerization mixture. The capped radicals located at the surface of the pores of the monolith were used for subsequent grafting of functionalized linear chains from monomers such as tert-butyl methacrylate, chloromethylstyrene, or vinylpyridine at 110°C. The extent of grafting within the pores could be controlled by adjusting the reaction time or diluting the monomer with an inert solvent.

AB - Porous polymer monoliths have been prepared by polymerization of styrene and divinyl-benzene in the presence of porogenic solvents initiated by 2,2,5-trimethyl-3-(1-phenylethoxy)-4-phenyl-3-azahexane. Although the polymerization reaction initiated by this alkoxyamine initiator is slower than that initiated by typical free-radical initiators, almost complete conversions were obtained at temperatures of 95 and 110°C. The porous properties of the monolithic materials were easily controlled in a broad range by adjusting the composition of the porogenic solvents in the polymerization mixture. The capped radicals located at the surface of the pores of the monolith were used for subsequent grafting of functionalized linear chains from monomers such as tert-butyl methacrylate, chloromethylstyrene, or vinylpyridine at 110°C. The extent of grafting within the pores could be controlled by adjusting the reaction time or diluting the monomer with an inert solvent.

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U2 - 10.1021/ma000797e

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Use of stable free radicals for the sequential preparation and surface grafting of functionalized macroporous monoliths

Abstract

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