Pyrolysis-infrared absorption spectrometric analysis of nylon 6-66 copolymers

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  • TSUGE Shin
    Department of Synthetic Chemistry, Faculty of Engineering, Nagoya University
  • ITO Hajime
    Department of Synthetic Chemistry, Faculty of Engineering, Nagoya University
  • TAKEUCHI Tsugio
    Department of Synthetic Chemistry, Faculty of Engineering, Nagoya University

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Other Title
  • ナイロン6-66共重合体の熱分解-赤外吸収スペクトル法による分析
  • ナイロン 6-66 キョウジュウゴウタイ ノ ネツ ブンカイ-セキガイ キュウシュウ スペクトルホウ ニ ヨル ブンセキ

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Description

An analytical method for nylon 6-66 copolymers was investigated with pyrolysis-infrared absorption spectrometry.<BR>The sample weighing 30 mg was pyrolyzed at 500°C under an inert atmosphere (Ar), and the degradation products were trapped in CCl4 cooled to 0°C in an ice-water bath. Then the infrared spectrum of the CCl4 solution was measured on the solution cell. Strong characteristic bands were observed at 2920 cm-1, 1750 cm-1, 1680 cm-1, and were assigned as, νasym (CH) of CH2 groups, ν(C=O) of cyclopentanone and ν(C=O) of ε-caprolactam (Amide I), respectively. Among the absorption ratios between them, A1680cm-1/A2920cm-1 was found to be best with respect to the precision. Determination of the composition of the copolymers was possible by using the calibration curve for the physical blends of the homopolymers. The relative standard deviation was 25%. The pyrolysis mechanism of polyamides was also discussed.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 17 (11), 1432-1436, 1968

    The Japan Society for Analytical Chemistry

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