モデル試験片を用いたグリーンコンポジット界面での加水分解促進挙動のその場観察

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タイトル別名
  • In-situ Observation of Accelerating Behavior in Hydrolysis at Interface of Green Composites Using Model Specimens
  • モデル シケンヘン オ モチイタ グリーンコンポジット カイメン デ ノ カスイブンカイ ソクシン キョドウ ノ ソノ バ カンサツ

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説明

Recently, green composites (GC) using natural fibers and biodegradable resin have been developed and investigated, aiming at contribution to preservation and improvement of the global environment. However, in composites using biodegradable resin as matrix, it is considered that the degradation by hydrolysis might be selectively accelerated at the interface. In the present study, we aim to clarify the local hydrolysis behavior at interface in fiber reinforced plastics using biodegradable resin as matrix. Here, we prepared a new type of GC model specimen, where the inside interfacial debonding can be observed directly, using a glass rod (GR) as fiber and polybutylene succinate adipate (PBSA) as matrix. In-situ observation of the internal interfacial debonding behavior was carried out during tensile tests of GC model specimens after immersion into water within the range of 3 weeks of immersion time, where the tensile strength of PBSA matrix itself was not degraded. In addition, experimental results were discussed combined with a simple finite element analysis. As a result, it was demonstrated that the hydrolytic degradation speed of interface was much higher than that of matrix resin. It was considered that water molecules diffused in the free volume of resin and locally accumulated at the interface between fibers and resin, resulting in the acceleration of hydrolysis at the interface.

収録刊行物

  • 材料システム

    材料システム 31 (0), 31-36, 2013

    学校法人 金沢工業大学 材料システム研究所

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