Functionality type analysis of carboxy-terminated oligostyrenes by gradient high performance liquid chromatography

✍ Scribed by Dietrich Braun; Inka Henze; Harald Pasch

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 475 KB
• Volume: 198
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1997.021981103

✦ Synopsis

Carboxy-terminated oligostyrenes, prepared by radical polymerization using a dicarboxy-functional initiator, can efficiently be separated by gradient high performance liquid chromatography (HPLC). On a normal phase chromatographic system, comprising a silica gel stationary phase and a tetrahydrofuran-hexane eluent, elution occurs in the order of increasing polarity of the oligomers and separation into non-, mono-, and dicarboxy oligomer fractions is obtained. The chemical structure of the different functionality fractions is determined by matrix assisted laser desorptiordionization mass spectrometry (MALDI-MS). The results indicate that further functionality fractions in addition to the carboxy oligomers are formed, due to contamination of the initiator or side reactions during the polymerization process.