Mending Ability of Network Polymers Loosely Cross-linked by Reversible Bonds

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  • YOSHIE Naoko
    Institute of Industrial Science, The University of Tokyo

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  • 可逆反応によりゆるく架橋したネットワークポリマーの修復性
  • カギャク ハンノウ ニ ヨリ ユルク カケハシ シタ ネットワークポリマー ノ シュウフクセイ

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Abstract

Mending ability of network polymers with dynamic cross-links is described. The polymers are networked by thermo-reversible Diels-Alder (DA) reaction of furyl-telechelic prepolymers and tris-maleimide. Because of the moderate molecular weight of the prepolymers, the network polymer is only loosely cross-linked. The mending ability of the polymers is induced by the reversible formation of cross-links. To achieve this mechanism, two conditions are required: the molecular scission upon the material failure occurs at the DA adduct by the retro-DA reaction and the free furan and maleimide groups generated by the chains scission have mobility high enough to reform the DA adduct bridging the crack surfaces. When anthryl-telechelics is used in place of furyl-one, a tough self-mendable elastomer with higher thermal stability can be obtained.

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  • NIPPON GOMU KYOKAISHI

    NIPPON GOMU KYOKAISHI 85 (8), 255-259, 2012

    THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

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