Tapered block copolymers containing ethylene and a functionalized comonomer

Steve J. Diamanti, Vikram Khanna, Atsushi Hotta, Robert C. Coffin, Diane Yamakawa, Edward J. Kramer, Glenn H. Fredrickson, Guillermo C. Bazan

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

We report the synthesis of tapered block copolymers of ethylene with 5-norbomen-2-yl acetate (1) by the nickel catalyst system [N-(2,6- diisopropylphenyl)-2-(2,6-diisopropylphenylimino)propanamide] Ni-η 1-CH 2Ph)(PMe 3) (2) and Ni(COD) 2 (bis(1,4-cyclooctadiene)nickel). This technique utilizes a one-pot semibatch copolymerization in which ethylene is continuously added while 1 is depleted by incorporation into the polymer chain. The simplicity of this technique allows the construction of a polymer library, which enabled us to study the effect of polymer composition and chain length on solid-state morphology and mechanical and thermal properties. From these studies we were able to derive a profile relating the probability of 1 insertion vs degree of polymerization (X n). Under proper experimental conditions, these tapered polymers form ordered microphase-separated morphologies where the phase morphology is modulated by the polymer chain length. The percent crystallinity and storage modulus of the polymers were found to be chain length dependent.

Original languageEnglish
Pages (from-to)3270-3274
Number of pages5
JournalMacromolecules
Volume39
Issue number9
DOIs
Publication statusPublished - 2006 May 2
Externally publishedYes

Fingerprint

Block copolymers
Polymers
Ethylene
Chain length
Nickel
Copolymerization
ethylene
Acetates
Thermodynamic properties
Elastic moduli
Polymerization
Mechanical properties
Catalysts
Chemical analysis

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Diamanti, S. J., Khanna, V., Hotta, A., Coffin, R. C., Yamakawa, D., Kramer, E. J., ... Bazan, G. C. (2006). Tapered block copolymers containing ethylene and a functionalized comonomer. Macromolecules, 39(9), 3270-3274. https://doi.org/10.1021/ma052456c

Tapered block copolymers containing ethylene and a functionalized comonomer. / Diamanti, Steve J.; Khanna, Vikram; Hotta, Atsushi; Coffin, Robert C.; Yamakawa, Diane; Kramer, Edward J.; Fredrickson, Glenn H.; Bazan, Guillermo C.

In: Macromolecules, Vol. 39, No. 9, 02.05.2006, p. 3270-3274.

Research output: Contribution to journalArticle

Diamanti, SJ, Khanna, V, Hotta, A, Coffin, RC, Yamakawa, D, Kramer, EJ, Fredrickson, GH & Bazan, GC 2006, 'Tapered block copolymers containing ethylene and a functionalized comonomer', Macromolecules, vol. 39, no. 9, pp. 3270-3274. https://doi.org/10.1021/ma052456c
Diamanti SJ, Khanna V, Hotta A, Coffin RC, Yamakawa D, Kramer EJ et al. Tapered block copolymers containing ethylene and a functionalized comonomer. Macromolecules. 2006 May 2;39(9):3270-3274. https://doi.org/10.1021/ma052456c
Diamanti, Steve J. ; Khanna, Vikram ; Hotta, Atsushi ; Coffin, Robert C. ; Yamakawa, Diane ; Kramer, Edward J. ; Fredrickson, Glenn H. ; Bazan, Guillermo C. / Tapered block copolymers containing ethylene and a functionalized comonomer. In: Macromolecules. 2006 ; Vol. 39, No. 9. pp. 3270-3274.
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