Nitroxide-mediated polymerization to form symmetrical ABA triblock copolymers from a bidirectional alkoxyamine initiator

Jean Ruehl; Aaron Nilsen; Stephen Born; Praveen Thoniyot; Li ping Xu; Shaowei Chen; Rebecca Braslau

doi:10.1016/j.polymer.2007.03.008

Nitroxide-mediated polymerization to form symmetrical ABA triblock copolymers from a bidirectional alkoxyamine initiator

Jean Ruehl, Aaron Nilsen, Stephen Born, Praveen Thoniyot, Li ping Xu, Shaowei Chen, Rebecca Braslau

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

25 Scopus citations

Abstract

Bidirectional alkoxyamine 2 was synthesized and used as the initiator in the polymerization of styrene (S), n-butyl acrylate (nBA), t-butyl acrylate (tBA), isoprene (I), and dimethylacrylamide (DMA). A variety of symmetrical ABA triblock copolymers were prepared, ranging in size from 5 to 59 kDa. Kinetics studies and gel permeation chromatography (GPC) confirmed the "living" nature of these polymerizations. Trifluoroacetic acid was used to convert the PtBA blocks of these polymers into poly(acrylic acid) (PAA) blocks, forming ABA amphiphilic triblock copolymers. AFM images of PAA-b-PnBA-b-PAA and PAA-b-PS-b-PAA triblock copolymers ionized by the addition of 2,2′-(ethylenedioxy)bis(ethylamine) show evidence of self-assembly.

Original language	English (US)
Pages (from-to)	2564-2571
Number of pages	8
Journal	Polymer
Volume	48
Issue number	9
DOIs	https://doi.org/10.1016/j.polymer.2007.03.008
State	Published - Apr 24 2007
Externally published	Yes

Keywords

Alkoxyamine
Bidirectional
Nitroxide-mediated polymerization

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.polymer.2007.03.008

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title = "Nitroxide-mediated polymerization to form symmetrical ABA triblock copolymers from a bidirectional alkoxyamine initiator",

abstract = "Bidirectional alkoxyamine 2 was synthesized and used as the initiator in the polymerization of styrene (S), n-butyl acrylate (nBA), t-butyl acrylate (tBA), isoprene (I), and dimethylacrylamide (DMA). A variety of symmetrical ABA triblock copolymers were prepared, ranging in size from 5 to 59 kDa. Kinetics studies and gel permeation chromatography (GPC) confirmed the {"}living{"} nature of these polymerizations. Trifluoroacetic acid was used to convert the PtBA blocks of these polymers into poly(acrylic acid) (PAA) blocks, forming ABA amphiphilic triblock copolymers. AFM images of PAA-b-PnBA-b-PAA and PAA-b-PS-b-PAA triblock copolymers ionized by the addition of 2,2′-(ethylenedioxy)bis(ethylamine) show evidence of self-assembly.",

keywords = "Alkoxyamine, Bidirectional, Nitroxide-mediated polymerization",

author = "Jean Ruehl and Aaron Nilsen and Stephen Born and Praveen Thoniyot and Xu, {Li ping} and Shaowei Chen and Rebecca Braslau",

year = "2007",

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doi = "10.1016/j.polymer.2007.03.008",

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pages = "2564--2571",

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T1 - Nitroxide-mediated polymerization to form symmetrical ABA triblock copolymers from a bidirectional alkoxyamine initiator

AU - Ruehl, Jean

AU - Nilsen, Aaron

AU - Born, Stephen

AU - Thoniyot, Praveen

AU - Xu, Li ping

AU - Chen, Shaowei

AU - Braslau, Rebecca

PY - 2007/4/24

Y1 - 2007/4/24

N2 - Bidirectional alkoxyamine 2 was synthesized and used as the initiator in the polymerization of styrene (S), n-butyl acrylate (nBA), t-butyl acrylate (tBA), isoprene (I), and dimethylacrylamide (DMA). A variety of symmetrical ABA triblock copolymers were prepared, ranging in size from 5 to 59 kDa. Kinetics studies and gel permeation chromatography (GPC) confirmed the "living" nature of these polymerizations. Trifluoroacetic acid was used to convert the PtBA blocks of these polymers into poly(acrylic acid) (PAA) blocks, forming ABA amphiphilic triblock copolymers. AFM images of PAA-b-PnBA-b-PAA and PAA-b-PS-b-PAA triblock copolymers ionized by the addition of 2,2′-(ethylenedioxy)bis(ethylamine) show evidence of self-assembly.

AB - Bidirectional alkoxyamine 2 was synthesized and used as the initiator in the polymerization of styrene (S), n-butyl acrylate (nBA), t-butyl acrylate (tBA), isoprene (I), and dimethylacrylamide (DMA). A variety of symmetrical ABA triblock copolymers were prepared, ranging in size from 5 to 59 kDa. Kinetics studies and gel permeation chromatography (GPC) confirmed the "living" nature of these polymerizations. Trifluoroacetic acid was used to convert the PtBA blocks of these polymers into poly(acrylic acid) (PAA) blocks, forming ABA amphiphilic triblock copolymers. AFM images of PAA-b-PnBA-b-PAA and PAA-b-PS-b-PAA triblock copolymers ionized by the addition of 2,2′-(ethylenedioxy)bis(ethylamine) show evidence of self-assembly.

KW - Alkoxyamine

KW - Bidirectional

KW - Nitroxide-mediated polymerization

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JO - Polymer

JF - Polymer

IS - 9

ER -

Nitroxide-mediated polymerization to form symmetrical ABA triblock copolymers from a bidirectional alkoxyamine initiator

Abstract

Keywords

ASJC Scopus subject areas

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