Thermoplastic processing of thermotropic liquid crystalline polymers under the influence of electric and/or magnetic fields

摘要

The shaping processing includes in particular the casting, spinning, extruding, pressing and injection molding of polymers. An electrical and / or magnetic field acts on the flowing polymer melt before and / or during and / or after shaping. The temperature of the melt is kept at a value between the glass temperature and the isotropic point. Thermotropic liquid crystalline polymers are used as the starting product. In principle, this includes all polymers which have mesogenic groups in the main and / or side chain and can be processed from the liquid-crystalline melt phase. The orientation and thus also the mechanical properties of the end product can be set in a targeted manner by means of the electrical or magnetic field.