高分子成形加工におけるレオロジー

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概要

• 論文の詳細を見る

• The rheological behaviors related to polymer processing have been broadly reviewed. The influence of working conditions on the relationship between the flow and the deformation strain has been experimented mainly in respect of compression, for both the amorphous and the crystalline polymers. In particular, the possibility of cold processing is proposed for the crystalline polymer. Many non-Newtonian formula in unidirectional flow have been explained, and it is concluded that pseudoplastic flow is likely to be most similar with that of molten polymer. The consistency curves of plastics are useful for practical molding, and are determined on the basis of the flow data obtained from curves of thermorheologically simple materials. On the other hand, the hysteresis effect in extrusion flow curves of crystalline polymers is discussed with melt fracture. Further, the temperature distribution in the radial direction through capillary is theoretically discussed for various non-Newtonian flows of the bosis of thermodynamic cnsideration. The theoretical analysis of calendering is developed for pseudoplastic flow. The experimental data on Weissenberg's extruder are presented with the theoretical aspect on normal stress effect. Resonable estimation on moldability is discussed, in particular, for injection. The residual stress in the molded products is presented as an important problem in polymer processing, and various testing methods on enviromental stress cracking are compared.

• 社団法人日本材料学会の論文
• 1964-04-15

著者

• 伊藤 勝彦

  理化学研究所

関連論文

• 結晶性高分子の冷間加工法
• 高分子成形加工におけるレオロジー
• 高分子の材料力学
• クリープひずみ回復法による高分子材料の粘弾性挙動の温度依存性に関する新しい簡易測定法 (第2報)(鋼球押込みによる方法)
• クリープひずみ回復法による高分子材料の粘弾性挙動の温度依存性に関する新しい簡易測定法 (第1報)(一軸圧縮による方法)
• プラスチックスの上下降伏点発生現象
• 高分子材料のかたさとレオロジー
• 高分子のクリープ破壊強さ

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