Explanation

The growth mode of coordination polymerization chain is "insertion growth", so it is often called insertion polymerization. It refers to the polymerization process in which the monomer molecule first cooperates at the empty orbital of the metal atom in the active center to form some form of coordination complex bond, and then the monomer molecule inserts into the metal (M,) - carbon (C) bond to grow, forming macromolecule. Choose different catalysts and polymerization conditions. It can prepare specific stereostructured polymer. Common coordination polymerization initiator include: Ziegk, r-Naua (Z-N) catalysts; VT allyl transition metal catalyst: alkyl lithium initiator; Metallocene initiator. Many important products in the macromolecule industry, such as high density polyethylene, isotactic polypropylene, cis-1,4-polybutadiene rubber and isoprene rubber, are prepared by coordination polymerization. polymer has excellent mechanical properties due to its regular three-dimensional structure.

Classification