METHOD FOR EVALUATING SWOLLEN STATE OF POLYACETAL RESIN COMPOSITION
To provide a method for evaluating a molecular mobility change of each of the crystalline, intermediate and amorphous phases of a polyacetal resin composition before and after swelling and evaluating the swollen state of the polyacetal resin composition.SOLUTION: Provided is a method for evaluating...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide a method for evaluating a molecular mobility change of each of the crystalline, intermediate and amorphous phases of a polyacetal resin composition before and after swelling and evaluating the swollen state of the polyacetal resin composition.SOLUTION: Provided is a method for evaluating the swollen state of a polyacetal resin composition that includes a polyacetal resin. The method for evaluating the swollen state of the polyacetal resin composition includes: calculating, with regard to the polyacetal resin composition before and after swelling, by a solid NMR relaxation time measurement method, the T1 relaxation time of carbon 13 nucleus of an oxymethylene part as three components differing in mobility from each other; and calculating the reduction rate of the T1 relaxation time after swelling with respect to the T1 relaxation time before swelling, for each of the three components differing in mobility from each other.SELECTED DRAWING: None
【課題】ポリアセタール樹脂組成物の膨潤前後での結晶相、中間相、非晶相の各相の分子運動性変化を評価し、ポリアセタール樹脂組成物の膨潤状態を評価する方法を提供する。【解決手段】ポリアセタール樹脂を含むポリアセタール樹脂組成物の膨潤状態を評価する方法であって、膨潤前後の前記ポリアセタール樹脂組成物について、固体ＮＭＲの緩和時間測定法により、オキシメチレン部の炭素１３核のＴ１緩和時間を運動性の互いに異なる３成分として算出し、膨潤前のＴ１緩和時間に対する膨潤後のＴ１緩和時間の減少率を、前記運動性の互いに異なる３成分の各々について算出することを含む、ポリアセタール樹脂組成物の膨潤状態の評価方法。【選択図】なし |
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