Complexation of amidated pectin with poly(itaconic acid) as a polycarboxylic polymer model compound

• Published in: Carbohydrate research Vol. 346; no. 15; pp. 2463 - 2468
• Main Authors: Nesic, Aleksandra R., Trifunovic, Snezana S., Grujic, Aleksandar S., Velickovic, Sava J., Antonovic, Dusan G.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Ltd 08-11-2011
• Subjects: complexing; electron microscopy; Fourier transform infrared spectroscopy; FTIR; Hydrogen Bonding; itaconic acid; Macromolecular Substances - chemistry; Membranes, Artificial; Microscopy, Electron, Scanning; Pectin; pectins; Pectins - chemistry; Poly(itaconic acid); Polyethylenes - chemistry; Polymer complex; polymers; scanning electron microscopy; spectroscopy; Spectroscopy, Fourier Transform Infrared; Succinates - chemistry; Thermal properties; thermal stability; Thermogravimetry; Thermal properties; Poly(itaconic acid); Pectin; FTIR; Polymer complex
• ISSN: 0008-6215; 1873-426X
• DOI: 10.1016/j.carres.2011.08.021

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► Synthesis and characterization of amidated pectin complexes with poly(itaconc acid). ► Uniform films for all investigated ratios—pectin amount from 10% to 90%. ► FTIR confirms complexation. ► Increased thermal stability of all investigated films.
Complexes based on amidated pectin (AP) and poly(itaconic acid) (PIA) were prepared by casting films from solutions of AP and PIA in different ratios with the pectin amount ranging from 10% to 90% by mass. The complexes were investigated by elemental analysis, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetry (TG). In all investigated ratios of AP/PIA glassy transparent films with a uniform structure were obtained. The results of elemental analysis confirmed the composition of the complexes, and FTIR spectroscopy has shown carboxylic and amide peak shifting, indicating complex formation between AP and PIA. Comparison of thermograms of AP/PIA films with different ratios of AP indicated that the increase of the amount of AP increases the thermal stability of the films by retarding the onset of the main degradation processes.