polymer cyclization

Chemical reaction that leads to the formation of ring structures in or from polymer chains.
  1. Examples of @[email protected] along polymer chains are: (a) @[email protected] of polyacrylonitrile, (b) acetalization of poly(vinyl alcohol) with an aldehyde, (c) @[email protected] of polymers of conjugated @[email protected], such as polyisoprene or polybutadiene, leading to macrocycles.
  2. Examples of @[email protected] of polymer molecules are: (a) @C014[email protected] of poly(dimethylsiloxane), (b) back-biting reaction during ionic polymerizations of heterocyclic monomers.
PAC, 2004, 76, 889. (Definitions of terms relating to reactions of polymers and to functional polymeric materials (IUPAC Recommendations 2003)) on page 893 [Terms] [Paper]