Ethylene-based polymers and processes to make the same

A process to form an ethylene-based polymer, said process comprising polymerizing ethylene in the presence of at least one free-radical agent, and in the presence of a “metal alkyl-containing compound” selected from the group consisting of the following:

• i) at least one “Group II metal alkyl-containing compound,”
• ii) at least one “Group III metal alkyl-containing compound,” or
• iii) a combination of i) and ii);
• and
• wherein the Group II metal is Zn;
• the Group III metal is Al;
• and wherein the free-radical agent is a peroxide;
• and
• wherein the polymerization temperature greater than, or equal to, 180° C.;
• and wherein the ethylene-based polymer has the following properties:
• a molecular weight distribution (Mw(conv)/Mn(conv)) from 2 to 6;
• a vinyl content greater than, or equal to, 0.3 vinyl per 1000 C;
• and a polymerized alpha-olefin level less than, or equal to, 1.00 mole percent, based on the total moles of polymerized monomer.