Synthesis of polyacetylene films with high density and high mechanical strength

K. Akagi, M. Suezaki, H. Shirakawa, H. Kyotani, M. Shimomura, Y. Tanabe

    Research output: Contribution to journalArticle

    81 Citations (Scopus)

    Abstract

    We report for the first time synthesis of high density and high mechanical strength polyacetylene films. Young's modulus and tensile strength of trans films stretched by 7 to 8 times are 100 and 0.9 GPa, respectively, comparable to those of well-known engineering plastics such as Kevlar (132 and 3.9 GPa, respectively). The films have been synthesized by using a refined non-solvent polymerization method linked with thermal treatment of catalyst solution at higher temperature. The catalyst solution was prepared by adding Ti(OBu)4 and AlEt3 into cumene solvent and subsequently it was aged at 150 °C for 3 to 5 hours. Polymerization was carried out at -78 °C under the condition where solvent was evaporated completely through dynamic pumping just before introduction of acetylene gas. The films thus prepared have not only high density of more than 1.0 g/cm3 but also high mechanical strengths. Profound potentiality of the present films was also exemplified in their electrical properties to give high conductivities of more than 2.0 × 104 S/cm upon iodine doping. Discussions have been made in terms of polymerization behavior and morphological structure essentially affecting density, drawability and mechanical strengths.

    Original languageEnglish
    Pages (from-to)D1
    JournalSynthetic Metals
    Volume28
    Issue number3
    DOIs
    Publication statusPublished - 1989 Feb 20

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

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  • Cite this

    Akagi, K., Suezaki, M., Shirakawa, H., Kyotani, H., Shimomura, M., & Tanabe, Y. (1989). Synthesis of polyacetylene films with high density and high mechanical strength. Synthetic Metals, 28(3), D1. https://doi.org/10.1016/0379-6779(89)90667-X