| 摘要 |
<p>Highly branched compositions including: (i) from 96 wt% to 99.9 wt% metallocene catalyzed ethylene propylene diene derived units; and (ii) from 0.1 wt% to 4 wt% multifunctional monomer derived units, wherein the highly branched composition has: (a) a Mooney viscosity ML (1 + 4) at 125°C of 30 to 100 MU, (b) a Mooney relaxation area MLRA of 100 to 1000, (c) a branching index, g'(vis) of less than 0.9, (d) a phase angle,δ, of less than 55 degrees at a complex modulus of 10 kPa, measured at 190°C, and (e) a degree of shear thinning greater than 0.95, measured at 190°C, are disclosed herein. Homogeneous blends including this composition are also described. Processes to make the highly branched composition and the homogeneous blend are also described herein.</p> |
