Enhanced Polymer Structure, Searching, And Retrieval In An Interactive Database

A fully interactive, online, proprietary database that uses Chemical Abstracts Services (GAS) STN MESSENGER software is described. Recent enhancements offered by MESSENGER software for structure records for polymers make this a powerful, flexible tool for polymer registration, searching, and retrieval. Categorization, classification, and naming of polymers are explained. Polymer types include the following: (1) source-based condensation (polyamides, polyesters, polyimides, polyurethanes, and combinations of these, e.g., polyamide-esters); (2) other source-based [carbon-carbon multiple-bond (acetylenic, acrylic, ethylenic, vinyl); other (e.g., formaldehyde, melamine, phenol, urea)]; (3) structural repeating unit (constitutional repeating unit). Source-based versus structure-based representation is discussed. Nomenclature for polymer end groups is presented, together with their database registration. Aftertreated, alternating, block, comb, graft, ladder, and star-shaped polymers are also covered.