RHEOLOGICAL TEST METHOD FOR POLYMERS AND USE FOR CONTINUOUS PROCESS-CONTROL

The sensitive influence of polymer melt molecular structure on melt be havior has resulted in defined descriptions and test methods which per mit evaluation during the production process. The continuous melt inde x evaluation, corresponding to average molar mass, was optimized by tr ansfer of a scare model which takes into consideration changes in the viscoelastic behavior. A controlled flow pulsation in an online capill ary rheometer gives a method to determine elastic and viscous properti es in real time use.