Influence of Water Absorption on High-Impact Properties of Polyketone/Polyamide Polymer Alloys

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  • ポリケトンポリアミドポリマーアロイの耐衝撃性に及ぼす水の影響
  • ポリケトンポリアミド ポリマー アロイ ノ タイショウゲキセイ ニ オヨボス ミズ ノ エイキョウ

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The moisture-absorbed polyketone (PK)/polyamide (PA) polymer alloys show higher impact properties than polycarbonates (PC). TEM observations and SAXS measurements revealed that the co-continuous structure is formed from the PK rich phase and the PA rich phase of the polymer alloy. On the other hand, by solid state NMR spin diffusion method, the domain size of PK and PA was estimated to be form several tens nm to a few hundred nm (T1), whereas the domain size of both PK and PA is larger than a few nm (T1p). In addition, the shift of the glass transition temperature of the PK and PA components indicates the existence of some interactions between PK and PA in the alloy. Additionally, the NMR relaxation time measurements suggest that the molecular motion of PA was enhanced remarkably by the selective moisture adsorption on the amorphous phase of PA for alloys. We concluded that the impact properties of PK/PA alloys are improved with increase of elasticity for amorphous regions of PA by moisture absorption.<br>

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 66 (12), 570-576, 2009

    The Society of Polymer Science, Japan

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