Author/Authors :
Toda، نويسنده , , Akihiko and Tomita، نويسنده , , Chiyoko and Hikosaka، نويسنده , , Masamichi and Hibino، نويسنده , , Yu and Miyaji، نويسنده , , Hideki and Nonomura، نويسنده , , Chisato and Suzuki، نويسنده , , Toshitake and Ishihara، نويسنده , , Hideaki، نويسنده ,
Abstract :
The self-excited oscillation of neck propagation during cold drawing of polymer films has been examined experimentally. On the basis of Barenblattʹs model considering a thermo-mechanical coupling at the neck, the temperature rise at the neck has been studied with an infrared camera. The temperature began to rise in a range showing a negative velocity dependence of the applied load. The behavior is consistent with the view of thermo-mechanical coupling. The temperature rise was up to 80°C (>Tg) and explains the occurrence of crystallization for faster drawing rates. It has also been confirmed that the temperature rise follows the oscillation of stress due to the coupling.
