Hydrocarbon-Soluble Piperazine-Containing Dilithium Anionic Initiator for High Cis-1,4 Isoprene Polymerization

Alison R. Schultz, Sachin Bobade, Philip J. Scott, Timothy Edward Long

研究成果: Article

1 引用 (Scopus)

抄録

The synthesis of 1,4-bis[4-(1-phenylethenyl)benzyl] piperazine and subsequent reaction with sec-butyllithium enables a novel piperazine-containing difunctional organolithium initiator for the living anionic polymerization of isoprene. Piperazine provides a polar unit within the difunctional initiator, promoting ion dissociation and miscibility with hydrocarbon solvents, and enabling the formation of well-defined polyisoprene homopolymers with predictable molecular weights and controlled microstructure. In situ Fourier transform infrared spectroscopy monitors the dilithium initiator formation and the anionic polymerization of isoprene, revealing kinetic insight into this synthetic method. Furthermore, sequential monomer addition with styrene affords poly(styrene-block-isoprene-block-styrene) triblock copolymers with controlled molecular weights and narrow polydispersities. This novel initiator facilitates the synthesis of thermoplastic elastomers with desired cis-1,4 microstructure in polydienes.

元の言語English
記事番号1700201
ジャーナルMacromolecular Chemistry and Physics
219
発行部数1
DOI
出版物ステータスPublished - 2018 1 5
外部発表Yes

Fingerprint

Isoprene
Styrene
initiators
Hydrocarbons
Anionic polymerization
polymerization
hydrocarbons
Polymerization
Molecular weight
styrenes
molecular weight
Polyisoprenes
Thermoplastic elastomers
Microstructure
Living polymerization
Polydispersity
Homopolymerization
polyisoprenes
microstructure
Block copolymers

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

これを引用

Hydrocarbon-Soluble Piperazine-Containing Dilithium Anionic Initiator for High Cis-1,4 Isoprene Polymerization. / Schultz, Alison R.; Bobade, Sachin; Scott, Philip J.; Long, Timothy Edward.

:: Macromolecular Chemistry and Physics, 巻 219, 番号 1, 1700201, 05.01.2018.

研究成果: Article

Schultz, Alison R. ; Bobade, Sachin ; Scott, Philip J. ; Long, Timothy Edward. / Hydrocarbon-Soluble Piperazine-Containing Dilithium Anionic Initiator for High Cis-1,4 Isoprene Polymerization. :: Macromolecular Chemistry and Physics. 2018 ; 巻 219, 番号 1.
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abstract = "The synthesis of 1,4-bis[4-(1-phenylethenyl)benzyl] piperazine and subsequent reaction with sec-butyllithium enables a novel piperazine-containing difunctional organolithium initiator for the living anionic polymerization of isoprene. Piperazine provides a polar unit within the difunctional initiator, promoting ion dissociation and miscibility with hydrocarbon solvents, and enabling the formation of well-defined polyisoprene homopolymers with predictable molecular weights and controlled microstructure. In situ Fourier transform infrared spectroscopy monitors the dilithium initiator formation and the anionic polymerization of isoprene, revealing kinetic insight into this synthetic method. Furthermore, sequential monomer addition with styrene affords poly(styrene-block-isoprene-block-styrene) triblock copolymers with controlled molecular weights and narrow polydispersities. This novel initiator facilitates the synthesis of thermoplastic elastomers with desired cis-1,4 microstructure in polydienes.",
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AU - Long, Timothy Edward

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N2 - The synthesis of 1,4-bis[4-(1-phenylethenyl)benzyl] piperazine and subsequent reaction with sec-butyllithium enables a novel piperazine-containing difunctional organolithium initiator for the living anionic polymerization of isoprene. Piperazine provides a polar unit within the difunctional initiator, promoting ion dissociation and miscibility with hydrocarbon solvents, and enabling the formation of well-defined polyisoprene homopolymers with predictable molecular weights and controlled microstructure. In situ Fourier transform infrared spectroscopy monitors the dilithium initiator formation and the anionic polymerization of isoprene, revealing kinetic insight into this synthetic method. Furthermore, sequential monomer addition with styrene affords poly(styrene-block-isoprene-block-styrene) triblock copolymers with controlled molecular weights and narrow polydispersities. This novel initiator facilitates the synthesis of thermoplastic elastomers with desired cis-1,4 microstructure in polydienes.

AB - The synthesis of 1,4-bis[4-(1-phenylethenyl)benzyl] piperazine and subsequent reaction with sec-butyllithium enables a novel piperazine-containing difunctional organolithium initiator for the living anionic polymerization of isoprene. Piperazine provides a polar unit within the difunctional initiator, promoting ion dissociation and miscibility with hydrocarbon solvents, and enabling the formation of well-defined polyisoprene homopolymers with predictable molecular weights and controlled microstructure. In situ Fourier transform infrared spectroscopy monitors the dilithium initiator formation and the anionic polymerization of isoprene, revealing kinetic insight into this synthetic method. Furthermore, sequential monomer addition with styrene affords poly(styrene-block-isoprene-block-styrene) triblock copolymers with controlled molecular weights and narrow polydispersities. This novel initiator facilitates the synthesis of thermoplastic elastomers with desired cis-1,4 microstructure in polydienes.

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