H. Kricheldorf, M. Masri, Gert Schwarz
2006
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0
Influential Citations
11
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Journal
Journal of Macromolecular Science, Part A
Abstract
Two secondary diamines, namely 1,6‐bis(methylamino)hexane and 4,4′‐trimethylenebispiperidine, TMBP, were polycondensed with cyclic aliphatic anhydrides. All polycondensations were conducted in the melt at a final reaction temperature of 240°C and high molar mass polyamides were obtained. The MALDI‐TOF mass spectra displayed, almost exclusively, peaks of cyclic polyamides in the mass range below 5,000 Da (technical limit). The DSC measurements revealed that the polyamides derived from succinic acid were crystalline despite the lack of H‐bonds. The solubility in chloroform enabled SEC measurements of all polyamides, which proved broad molar mass distributions (with polydispersities around 3) which is characteristic for polymers containing high fractions of cycles.