ＰＰ／ＬＣＰポリマーブレンドの微細組織と疲労破壊特性に及ぼすＬＣＰ添加量の影響

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  • Effect of LCP Addition Content on the Microstructure and Fatigue Property of PP/LCP Polymer Blends.
  • PP LCP ポリマー ブレンド ノ ビサイ ソシキ ト ヒロウ ハカイ トクセイ ニ オヨボス LCP テンカリョウ ノ エイキョウ

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The effect of LCP content on the microstructure and fatigue fracture property of PP/LCP blend materials with easily recycle was investigated in this study. The results are following as : (1) PP/LCP blend is an immiscible two-phase material. While LCP content was below 40%, it would be easily formed fiber. (2) Because the thermal expansion coefficient of PP is large, LCP is a nonexpansion material. Thus, the mechanics joining strength of the interphase between PP and LCP phase would be improved when the PP content was more than 60%. (3) According to the tensile testing results, PP was a ductile material, but LCP is a typical brittle material. For those blend materials companion with the increase in the addition content of LCP, the tensile strength was increased, but the stretch would largely decreased. (4) E´would decrease and tan δ would increase on the recycling fatigue of PP single phase, because the specimen producing heating itself happened ductile fracture. Companion to the increase in the addition content of LCP on the fatigue process, the trend degree of the decrease in E´and increase in tan δ would lower, the specimen lifetime would become larger, the fracture would also change to the brittle property.

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