ポリスチレンのマテリアルリサイクルにおける熱劣化2.分子量による影響

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タイトル別名
  • Heat Degradation of Poly(styrene) in Extruding Cycles 2Effects of Molecular Weight
  • ポリスチレン ノ マテリアルリサイクル ニ オケル ネツ レッカ 2 ブンシリョウ ニ ヨル エイキョウ

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抄録

Poly(styrene) samples (MW1C and G100C) were reprocessed in multiple cycles by a single-screw extruder. The reprocessed heat degraded samples were characterized by dynamic viscoelasticity and stress-strain measurement.<br> When the temperatures of heat degradation and the volume velocity of extrusion were particularly selected, the molecular weight (Mη) for the heat degradation samples was expressed by the time (t) required in extrusion without depending on original molecular weight. In blend system, the decrease in Mη was expressed by similar relationship for homo-system, suggesting that the synergy effect of blend on the heat degradation was neglected. Young's modulus (E) obtained from stress-strain curves did not change for both the virgin and the heat degraded samples. It is important to reprocess at temperature (T) as low as possible in order to increase the cycles number (n)<br>

収録刊行物

  • 環境資源工学

    環境資源工学 54 (3), 145-151, 2007

    一般社団法人 環境資源工学会

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