Monohydrate and anhydrate of nylon 5I monomer 1,5-pentanediamine-isophthalate.

ABSTRACT: Nylon 5I is one of the new bio-based nylon materials. Its raw material 1,5-pentanediamine (PDA) is prepared by biological methods using biomass as the raw material. The high-performance polymer materials require the original high-quality monomers. 1,5-Pentanediamine-isophthalate (PDA-IPA) was taken as the direct monomer for the preparation of nylon 5I, and the crystallization was a valuable and essential approach to preparing the good-performance monomer salt. In this report, we found and obtained two crystal forms of PDA-IPA, monohydrate and an anhydrous form. Their crystal structures were determined and analyzed by single crystal X-ray diffraction (SCXRD), powder X-ray diffraction (PXRD), and Fourier transform infrared spectroscopy (FTIR). Hirshfeld surface maps were employed to capture

SUBMITTER: Li Z 

PROVIDER: S-EPMC9058625 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature