1206 インデンテーション法による高分子材料のクリープコンプライアンスの測定(S05-2 ナノ・マイクロ材料の強度・信頼性(2)ナノ・マイクロ材料の強度物性測定,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)
詳細
Indentation technique is applied to evaluate the viscoelastic characteristic of a polymeric material. In this study, load controlled indentation test using a Berkovich indenter was carried out onto Polypropylene (PP), and the shape of the impression was measured by AFM. As the result, viscoelastic creep recovery after indentation test occurs at an apex of the impression, not at edges. Therefore, the shape of the recovered impression is apparently different from that of the indenter. The creep compliance calculated from true viscoelastic deformation which is evaluated from measured penetration depth excluding residual depth obtained by AFM corresponds with the creep compliance evaluated by uniaxial tensile test. This fact means that the viscoelastic characteristics of polymeric materials can be evaluated by indentation technique over a wide time range.
