EFFECT OF LONG CHAIN BRANCHING ON THE RHEOLOGY AND FLAME PROPERTIES IN POLYCARBONATE RESINS

摘要

It is known from literature [1,2] that the rheological properties of polymer melts are influenced by the degree of long chain branching (LCB).Therefore,it is very important to understand the influence of LCB on the solid-state properties to help improve material design for unique applications.The objective of the present study is to demonstrate the use of extensional rheology as a tool to understand FR performance pertaining to dripping.Further,we also demonstrate the synergistic role of LCB in polycarbonate resins for improving FR performance.