The New Technology for Material Evaluation with Pulse NMR

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  • KUMAI Mio
    Imaging Engine Development Division, RICOH Co., Ltd.

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  • パルスNMRによる材料評価技術
  • パルス NMR ニ ヨル ザイリョウ ヒョウカ ギジュツ

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Technology for evaluating resin materials using pulse nuclear magnetic resonance (Pulse NMR), which can measure the molecular mobility, were developed. One technique was evaluating the storage stability to heat, which was developed by focusing on the high molecular mobility of the low-temperature melting component of the crystalline polyester resins for toner. Compared to the temperature modulated differential scanning calorimetry (Temperature Modulated DSC), this technique can be evaluated simply with high sensitivity. Another technique was evaluating the resin hardness, which was developed by noting that the molecular mobility of low hardness resin was high. This technique can measure the sample in any form and obtain numerical information. And it was shown to be a suitable hardness evaluation method to supplement the pencil hardness test.

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