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Structural influences on the properties of aromatic polyamidines
Author(s) -
Böhme Frank,
Kunert Christoph,
Klinger Christian,
Komber Hartmut
Publication year - 1998
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19981280118
Subject(s) - trimer , orthoester , amidine , diamine , chemistry , triethyl orthoformate , condensation polymer , polymer chemistry , pyridine , hydrogen bond , hexamethylenediamine , polymer , organic chemistry , molecule , dimer , catalysis , polyamide
Polyamidines with both nitrogens in the main chain (‐X‐NH‐CR=N‐) were obtained by polycondensation of diamines with different orthoesters. The thermal properties could be tailored by the choice of diamine and orthoester. Quantitative formation of a cyclic trimer could be observed when 2,6‐diamino‐pyridine was converted with triethyl orthoformate. 1 H, 13 C and 15 N NMR spectroscopic investigations in solution and in solid state showed that the configuration of the amidine group was strongly dependent on the residue R. In polyformamidines, strong interactions caused by hydrogen bonds could be evidenced.