抄録
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 extrusion rheometer. The method of reduced variables is applicable also to the extrusion flow 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.
