Synthesis of Self-Healing Polymers by Scandium-Catalyzed Copolymerization of Ethylene and Anisylpropylenes

Haobing Wang, Yang Yang, Masayoshi Nishiura, Yuji Higaki, Atsushi Takahara, Zhaomin Hou

研究成果: ジャーナルへの寄稿記事

6 引用 (Scopus)

抄録

Self-healing materials are of fundamental interest and practical importance. Herein we report the synthesis of a new class of self-healing materials, formed by the copolymerization of ethylene and anisyl-substituted propylenes using a sterically demanding half-sandwich scandium catalyst. The copolymerization proceeded in a controlled fashion, affording unique multi-block copolymers composed of relatively long alternating ethylene-alt-anisylpropylene sequences and short ethylene-ethylene units. By controlling the molecular weight and varying the anisyl substituents, a series of copolymers that show a wide range of glass-transition temperatures (T g ) and mechanical properties have been obtained. The copolymers with T g below room temperature showed high elastic modulus, high toughness, and remarkable self-healability, being able to autonomously self-heal upon mechanical damage not only in a dry environment but also in water and aqueous acid and alkaline solutions, while those with T g around or above room temperature exhibited excellent shape-memory property. The unique mechanical properties may be ascribed to the phase separation of the crystalline ethylene-ethylene nanodomains from the ethylene-alt-anisylpropylene matrix.

元の言語英語
ジャーナルJournal of the American Chemical Society
DOI
出版物ステータス出版済み - 1 1 2019

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Scandium
Copolymerization
Polymers
Ethylene
Self-healing materials
Copolymers
Mechanical properties
Temperature
Transition Temperature
Elastic Modulus
ethylene
Shape memory effect
Phase separation
Block copolymers
Toughness
Glass
Molecular Weight
Elastic moduli
Molecular weight
Crystalline materials

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

これを引用

Synthesis of Self-Healing Polymers by Scandium-Catalyzed Copolymerization of Ethylene and Anisylpropylenes. / Wang, Haobing; Yang, Yang; Nishiura, Masayoshi; Higaki, Yuji; Takahara, Atsushi; Hou, Zhaomin.

:: Journal of the American Chemical Society, 01.01.2019.

研究成果: ジャーナルへの寄稿記事

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abstract = "Self-healing materials are of fundamental interest and practical importance. Herein we report the synthesis of a new class of self-healing materials, formed by the copolymerization of ethylene and anisyl-substituted propylenes using a sterically demanding half-sandwich scandium catalyst. The copolymerization proceeded in a controlled fashion, affording unique multi-block copolymers composed of relatively long alternating ethylene-alt-anisylpropylene sequences and short ethylene-ethylene units. By controlling the molecular weight and varying the anisyl substituents, a series of copolymers that show a wide range of glass-transition temperatures (T g ) and mechanical properties have been obtained. The copolymers with T g below room temperature showed high elastic modulus, high toughness, and remarkable self-healability, being able to autonomously self-heal upon mechanical damage not only in a dry environment but also in water and aqueous acid and alkaline solutions, while those with T g around or above room temperature exhibited excellent shape-memory property. The unique mechanical properties may be ascribed to the phase separation of the crystalline ethylene-ethylene nanodomains from the ethylene-alt-anisylpropylene matrix.",
author = "Haobing Wang and Yang Yang and Masayoshi Nishiura and Yuji Higaki and Atsushi Takahara and Zhaomin Hou",
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AU - Wang, Haobing

AU - Yang, Yang

AU - Nishiura, Masayoshi

AU - Higaki, Yuji

AU - Takahara, Atsushi

AU - Hou, Zhaomin

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Self-healing materials are of fundamental interest and practical importance. Herein we report the synthesis of a new class of self-healing materials, formed by the copolymerization of ethylene and anisyl-substituted propylenes using a sterically demanding half-sandwich scandium catalyst. The copolymerization proceeded in a controlled fashion, affording unique multi-block copolymers composed of relatively long alternating ethylene-alt-anisylpropylene sequences and short ethylene-ethylene units. By controlling the molecular weight and varying the anisyl substituents, a series of copolymers that show a wide range of glass-transition temperatures (T g ) and mechanical properties have been obtained. The copolymers with T g below room temperature showed high elastic modulus, high toughness, and remarkable self-healability, being able to autonomously self-heal upon mechanical damage not only in a dry environment but also in water and aqueous acid and alkaline solutions, while those with T g around or above room temperature exhibited excellent shape-memory property. The unique mechanical properties may be ascribed to the phase separation of the crystalline ethylene-ethylene nanodomains from the ethylene-alt-anisylpropylene matrix.

AB - Self-healing materials are of fundamental interest and practical importance. Herein we report the synthesis of a new class of self-healing materials, formed by the copolymerization of ethylene and anisyl-substituted propylenes using a sterically demanding half-sandwich scandium catalyst. The copolymerization proceeded in a controlled fashion, affording unique multi-block copolymers composed of relatively long alternating ethylene-alt-anisylpropylene sequences and short ethylene-ethylene units. By controlling the molecular weight and varying the anisyl substituents, a series of copolymers that show a wide range of glass-transition temperatures (T g ) and mechanical properties have been obtained. The copolymers with T g below room temperature showed high elastic modulus, high toughness, and remarkable self-healability, being able to autonomously self-heal upon mechanical damage not only in a dry environment but also in water and aqueous acid and alkaline solutions, while those with T g around or above room temperature exhibited excellent shape-memory property. The unique mechanical properties may be ascribed to the phase separation of the crystalline ethylene-ethylene nanodomains from the ethylene-alt-anisylpropylene matrix.

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