Melt Rheological Properties of Branched Polyethylenes Produced with Pd‐ and Ni–Diimine Catalysts

Abstract Summary: Seven branched polyethylenes differing in chain topology from hyperbranched to linear structure were synthesized with chain walking Pd‐diimine catalyst, [(ArNC(Me)C(Me)NAr) Pd(CH 3 )(NCMe)]SbF 6 ( 1 ), and Ni‐diimine catalyst, (ArNC(An)C(An)NAr) NiBr 2 ( 2 )/MMAO, respectively. An extensive rheological study, employing steady‐shear, creep‐recovery, and dynamic oscillation tests, was conducted to examine and compare the …