Synthesis and structure analysis of polyesteramides modified with bio-based diaminopentane hexanedioic salt

Abstract

Two series of bio-based diaminopentane hexanedioic salt (DHS) modified polyesteramides were successfully synthesized by two different synthesis processes in which DHS reacted with bis-hydroxyethyl terephthalate (BHET) and low molecular weight polyester (LPET), respectively. The intrinsic viscosities of the polyesteramides ranged from 0.62 dl/g to 0.78 dl/g, which correlated greatly with the requirements of subsequent processing such as spinning. The results of the hetero nuclear multiple bond correlation (HMBC) indicated that the diaminopentane segment was directly connected with the purified terephthalic acid (PTA) segment. The presence of ester and amide group characteristic peaks in the Fourier transform-infrared (FT-IR) spectroscopy confirmed that the final resultant products were polyesteramides. The results of elemental analysis showed that the ratio of actual nitrogen content to theoretical nitrogen content of two series of polyesteramides was 76%~90%, and the actual nitrogen content in both series was proportional to the addition of DHS.

Preparation, characterization and degradation study of novel sulfonated furanic poly(ester-amide)s

“…Using 1 H-NMR spectroscopy, they detected minor side reactions [24]. These same authors have studied the preparation of furanic-aliphatic polyesteramides from a furan diamine and adipic acid by two mass polycondensation techniques: the first one is based on the direct copolycondensation of monomers, namely the reaction of 5.5ʹ-Isopropylidene-bis(2-furfurylamine) (DAF) and ethanediol with diethyl adipate, and the second involves the aminolysis of an aliphatic polyester by DAF, followed by a polycondensation step [28,29].…”