Performance of Boron Nitride and its Combinations as Processing Aid in the Extrusion of Ziegler-Natta Polyethylenes

摘要

The performance of boron nitride,and its combinations with fluoropolymer as polymer processing aid in the extrusion of Ziegler-Natta polyethylenes is studied by using a capillary rheometer fitted with capillary and crosshead die.Two different techniques of compounding the polymer with the additives are used.In the first technique,both additives (boron nitride and fluoropolymer) are compounded together directly into the polymer.In the second technique,the additives are added separately.Improved performance via the second technique is observed.10 refs.