Doubly Charged ABA Triblock Copolymers: Thermomechanically Robust Physical Network and Hierarchical Microstructures

Xi Chen, Samantha J. Talley, James V. Haag, Glenn A. Spiering, Boer Liu, Kevin J. Drummey, Mitsuhiro Murayama, Robert B. Moore, Timothy E. Long

研究成果: ジャーナルへの寄稿記事

抜粋

This manuscript describes the structure-property-morphology relationships of doubly charged 1,4-diazabicyclo[2.2.2]octane (DABCO) salt-containing ABA triblock ionomers. The triblock copolymers consist a soft poly(n-butyl acrylate) (PnBA) central block and two external styrenic hard blocks bearing amphiphilic pendant C18-alkyl groups and doubly charged salt units. Surprisingly, the DABCO salt-containing ABA block copolymers preserved the thermomechanical integrity until degradation, which indicated the formation of a reinforcing physical network compared to the corresponding doubly charged random copolymers and singly charged block copolymer analogs. Small-angle X-ray scattering data revealed that the DABCO-based ABA block copolymers self-assembled into highly ordered hierarchical microstructures, in which the soft and hard domain of the block copolymers phase-separated into highly ordered lamellar morphologies. Moreover, a secondary structure that originated from the ordering of the amphiphilic pendant groups formed within the lamellar hard domain. The interesting thermal, thermomechanical, and morphological properties of doubly charged ionic block copolymers open promising avenues for the synthesis of novel thermoplastic elastomers.

元の言語英語
ページ(範囲)9168-9176
ページ数9
ジャーナルMacromolecules
52
発行部数23
DOI
出版物ステータス出版済み - 12 10 2019
外部発表Yes

    フィンガープリント

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

これを引用

Chen, X., Talley, S. J., Haag, J. V., Spiering, G. A., Liu, B., Drummey, K. J., ... Long, T. E. (2019). Doubly Charged ABA Triblock Copolymers: Thermomechanically Robust Physical Network and Hierarchical Microstructures. Macromolecules, 52(23), 9168-9176. https://doi.org/10.1021/acs.macromol.9b02075