Abstract:

This paper introduced the application of twin⁃screw extruder for the high⁃proportion solvent polyolefin elastomer （POE） devolatilization and granulation. Using an experiment plate， the “controlled stepwise devolatilization process” was investigated through setting a suitable temperature and configuration of twin screw under the different process requirement of different section and controlling different vacuum of every devolatilization section. A high proportion of solvent （75 wt%） in the POE fluid was devolatilized up to 50~200 ppm through the twin⁃screw extruder. Meanwhile， a key technical point in devolatilization process was described， which provided a design support in the mega⁃extrusion and devolatilization unit.

Key words: polyolefin elastomer, devolatilization, pelletizing, twin?screw extruder