Observation of Distribution of Acetylene Unit in Poly（ε-caprolactone）Moldings by Micro-Raman Spectroscopy

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  • アセチレン含有ポリカプロラクトンにおけるアセチレンユニットの顕微ラマン観察
  • アセチレン ガンユウ ポリカプロラクトン ニ オケル アセチレンユニット ノ ケンビラマン カンサツ

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<p>Investigations of distribution of the carbon-carbon triple bond in the moldings were carried outby measurement of Raman spectra. The moldings were prepared by reactive processing of poly（ε-caprolactone）（PCL）, bis（4-hydroxymethylphenyl）acetylene（SU）and multifunctional isocyanates（MFI）. The signal derived from SU was changed by the addition method of MFI. When the moldingswere prepared without MFI, aggregation of SU to the surface of the molding was observed. Themoldings prepared by simultaneous addition of MFI, SU, and PCL showed good dispersibility of SU.In contrast, when the moldings were prepared by addition of prepolymer（synthesized by reactionbetween MFI and SU）to PCL, heterogeneous distribution of SU which seems to come from aggregationbetween prepolymers was observed. In addition, the intensity of SU signal in the moldings wasnot changed by microtome treatment when MFI was used. These results suggested that the distributionof the functional additive in the molding depended on the molding method.</p>

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