Chain Branching Low-density polyethylene: >soft and flimsy >highly branched,amorphous structure middle of a polyethylene chain growing end of a chain chain with 2 free radical terminated chain (1 free radical) in the middle H,C=CH2 growing branch CH2一CH new chain growing original chain at the branch point 6 Copyright 2005 Pearson Prentice Hall,Inc. Chapter 26 6 Chain Branching • Low-density polyethylene: ➢soft and flimsy ➢highly branched, amorphous structure =>