Polymer‐glass separation in the spiral mold test

Publisher Website
Google Scholar
Abstract
The spiral mold method (moldability test) was used in a study of phase separation occurring in glass‐containing polyethylene and polyamide melts. Pronounced separation effects were recorded for low density polyethylene containing 25 percent glass spheres with diameters ranging approximately from 50 to 100 μm, the glass concentration at the tip of the spiral exceeding 40 percent by weight. For melts containing smaller spheres or fibers the effect was of the order of a few percent. There was a decrease in glass concentration near the center of the spiral.