Synthesis and properties of polyamidines

✍ Scribed by F. Böhme; C. Klinger; H. Komber; L. Häußler; D. Jehnichen

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 238 KB
• Volume: 36
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19980430)36:6<929::aid-pola8>3.0.co;2-b

✦ Synopsis

Polymers with amidine groups {NH{CR|N{ in the main chain were prepared by acid catalysed melt polycondensation of 4,4 -diaminodiphenyl methane (DAPM) with various orthoesters. The resulting polyamidines were characterized by 1 H-, 13 C-and 15 N-NMR spectroscopy, differential scanning calorimetry (DSC), thermogravimetry (TGA) and wide angle x-ray scattering (WAXS) measurements. The properties of the polyamidines are strongly determined by the substituent R on the amidine group. Some peculiarities of the polyformamidine (R|H) could be attributed to the conformation of the amidine group. Glass transition temperatures varied from 106 to 161ЊC depending on the substituent R. All polyamidines possessed good thermal stability up to 370ЊC and, with exception of the polyformamidine, good solubility in common solvents.