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Polymer reaction in polycarbonate with Na2CO3

Authors

  • Kunihiko Takeda,

    Corresponding author
    1. Nagoya University, Graduate School of Engeneering, Department of Materials Functional Engineering, Furoh-cho, Chikusa-ku, Nagoya 464-8603, Japan
    • Nagoya University, Graduate School of Engeneering, Department of Materials Functional Engineering, Furoh-cho, Chikusa-ku, Nagoya 464-8603, Japan
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  • Haruo Unno,

    1. Shibaura Institute of Technology, Department of Materials Science and Technology, 3-9-14 Shibaura, Minato-ku, Tokyo 108-8548, Japan
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  • Min Zhang

    1. Nagoya University, Graduate School of Engeneering, Department of Materials Functional Engineering, Furoh-cho, Chikusa-ku, Nagoya 464-8603, Japan
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Abstract

The recombination of polycarbonate (PC) chains has been researched as one of the studies on self-repairing materials. The specimens, which included sodium carbonate and Tri(2,4-di-t-buthylphenyl)phosphate, were treated at 120°C in a steam chamber and subsequently at 130°C under nitrogen atmosphere. The molecular weight of the specimen with 0.1 ppm of sodium carbonate increased during the subsequent treatment. The same tendency was observed when sodium carbonate was supplementally added to the specimen. In particular, the molecular weight little changed under severe condition when the concentration of sodium carbonate was controlled to be 100 to 1000 ppm. The result showed PC could be used as a self-repairing material. The deterioration is expected to be minimized if the recovery rate is the same as the deterioration rate by applying these self-repairing systems. The tensile strength, the transparency, and the reaction schemes are discussed. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 920–926, 2004

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