EPDM Terpolymer and Manufacturing Method Therefor

A method for manufacturing an ethylene-propylene-diene terpolymer for a fuel cell, the method comprising:

• performing a polymerization step of subjecting an organic chelate compound forming a coordinate bond, a vanadium-based Ziegler-Natta catalyst, an organoaluminum compound, and ethylene, propylene, and diene monomers, together with a solvent, to polymerization in a reactor;
• performing a separation step of recovering residual catalysts and unreacted monomers from a stream discharged from the reactor;
• and
• performing an acquisition step of recovering the solvent from the stream deprived of the residual catalysts and unreacted monomers to acquire the ethylene-propylene-diene terpolymer.

A method for manufacturing an ethylene-propylene-diene terpolymer, the method comprising:

• introducing elements to a reactor, the elements comprising:
• an organic chelate compound having at least one ligand forming coordinate bonds with a metal ion at two or more sites to form a complex ion or complex;
• a vanadium-based Ziegler-Natta catalyst, a molar ratio of the organic chelate compound and the vanadium-based Ziegler-Natta catalyst being 0.2-0.7;
• an organoaluminum compound, a molar ratio of the organoaluminum compound and the vanadium-based Ziegler-Natta catalyst being 5.0-8.0;
• ethylene, propylene, and diene monomers;
• and
• a solvent;
• subjecting the introduced elements to polymerization;
• recovering residual catalysts and unreacted monomers from a stream discharged from the reactor;
• and
• acquiring the ethylene-propylene-diene terpolymer by recovering the solvent from the stream after recovering the residual catalysts and the unreacted monomers.