Novel Glycopolymers Based on d-Mannose and Methacrylates: Synthesis, Thermal Stability and Biodegradability Testing |
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Authors: | Ana-Maria Pană Liliana-Marinela Ştefan Geza Bandur Paula Sfîrloagă Vasile Gherman Mihaela Silion Marcel Popa Lucian-Mircea Rusnac |
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Affiliation: | 1. Department of Natural and Synthetic Polymers, Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University, 73 Prof. dr. docent Dimitrie Mangeron, 70050, Iasi, Romania 2. Institute of Chemistry Timisoara of Romanian Academy, Mihai Viteazul 24, 300223, Timisoara, Romania 3. Faculty of Industrial Chemistry and Environmental Engineering, “Politehnica” University of Timi?oara, 6 Carol Telbisz, 300001, Timisoara, Romania 4. The Institute of Research for Condensed Matter, 1 P. Andronescu Str., 300224, Timisoara, Romania 5. “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi, Romania
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Abstract: | This paper presents the synthesis, thermal stability and biodegradability of new d-mannose glycopolymers. These glycopolymers have been obtained by free radical bulk copolymerization of d-mannose based glycomonomer, 1-O-(2′-hydroxy-3′-methacryloyloxypropyl)-2,3:5,6-di-O-isopropylidene-d-mannofuranose (Mm), and respectively d-mannose derived oligomer (Mo) with methyl methacrylate and respectively 2-hydroxypropyl methacrylate. The chemical structures of Mm and Mo have been confirmed via FTIR, 1H-NMR and HPLC–MS spectroscopy. The copolymerization process has been investigated using differential scanning calorimetry, which allowed calculating the activation energies by applying Kissinger–Akahira–Sunose method. The glycopolymers are thermally stable, fact assessed by TG analysis; their glass transition temperature exceeds 50 °C, so they are part of the glassy class of polymers. The biodegradability of these glycopolymers has been investigated in vitro, using pure cultures of Zymomonas mobilis and Trichoderma reesei. The glycopolymers lose up to 55 % weight in just 14 days of incubation as their surface and composition is altered by colonies of microorganisms that grow on/into them, fact demonstrated using SEM/EDX. |
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