Synthesis of new amphiphilic diblock copolymers containing poly(ethylene oxide) and poly(α-olefin)

Yingying Lu, Youliang Hu, Z. M. Wang, Evangelos Manias, Tze-chiang Chung

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

This article discusses an effective route to prepare amphiphilic diblock copolymers containing a poly(ethylene oxide) block and a polyolefin block that includes semicrystalline thermoplastics, such as polyethylene and syndiotactic polystyrene (s-PS), and elastomers, such as poly(ethylene-co-1-octene) and poly(ethylene-co-styrene) random copolymers. The broad choice of polyolefin blocks provides the amphiphilic copolymers with a wide range of thermal properties from high melting temperature ∼270°C to low glass-transition temperature ∼-60°C. The chemistry involves two reaction steps, including the preparation of a borane group-terminated polyolefin by the combination of a metallocene catalyst and a borane chain-transfer agent as well as the interconversion of a borane terminal group to an anionic (-O-K+) terminal group for the subsequent ring-opening polymerization of ethylene oxide. The overall reaction process resembles a transformation from the metallocene polymerization of α-olefins to the ring-opening polymerization of ethylene oxide. The well-defined reaction mechanisms in both steps provide the diblock copolymer with controlled molecular structure in terms of composition, molecular weight, moderate molecular weight distribution (Mw/Mn < 2.5), and absence of homopolymer.

Original languageEnglish (US)
Pages (from-to)3416-3425
Number of pages10
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume40
Issue number20
DOIs
StatePublished - Oct 15 2002

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Boranes
Alkenes
Polyethylene oxides
Olefins
Block copolymers
Ethylene Oxide
Polyolefins
Ethylene
Ring opening polymerization
Copolymers
Elastomers
Styrene
Polystyrenes
Polyethylene
Molecular weight distribution
Homopolymerization
Molecular structure
Thermoplastics
Oxides
Melting point

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

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title = "Synthesis of new amphiphilic diblock copolymers containing poly(ethylene oxide) and poly(α-olefin)",
abstract = "This article discusses an effective route to prepare amphiphilic diblock copolymers containing a poly(ethylene oxide) block and a polyolefin block that includes semicrystalline thermoplastics, such as polyethylene and syndiotactic polystyrene (s-PS), and elastomers, such as poly(ethylene-co-1-octene) and poly(ethylene-co-styrene) random copolymers. The broad choice of polyolefin blocks provides the amphiphilic copolymers with a wide range of thermal properties from high melting temperature ∼270°C to low glass-transition temperature ∼-60°C. The chemistry involves two reaction steps, including the preparation of a borane group-terminated polyolefin by the combination of a metallocene catalyst and a borane chain-transfer agent as well as the interconversion of a borane terminal group to an anionic (-O-K+) terminal group for the subsequent ring-opening polymerization of ethylene oxide. The overall reaction process resembles a transformation from the metallocene polymerization of α-olefins to the ring-opening polymerization of ethylene oxide. The well-defined reaction mechanisms in both steps provide the diblock copolymer with controlled molecular structure in terms of composition, molecular weight, moderate molecular weight distribution (Mw/Mn < 2.5), and absence of homopolymer.",
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Synthesis of new amphiphilic diblock copolymers containing poly(ethylene oxide) and poly(α-olefin). / Lu, Yingying; Hu, Youliang; Wang, Z. M.; Manias, Evangelos; Chung, Tze-chiang.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 40, No. 20, 15.10.2002, p. 3416-3425.

Research output: Contribution to journalArticle

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AU - Hu, Youliang

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