A new method of synthesis of aspartic acid/lactic acid copolymers under microwave field / Joanna Pagacz, Jan Pielichowski, Jolanta Polaczek // Molecular Crystals and Liquid Crystals [Dokument elektroniczny]. ... więcej

A new method of synthesis of aspartic acid/lactic acid copolymers under microwave field / Joanna Pagacz, Jan Pielichowski, Jolanta Polaczek // Molecular Crystals and Liquid Crystals [Dokument elektroniczny]. – 2010, Vol. 523, Iss. 1, s. 50/[622]-62/[634]. – Tryb dostępu: https://www.tandfonline.com/doi/full/10.1080/15421401003719787. – Bibliogr. 31 poz., Streszcz. ang. – Mat. konf.: Xth International Conference on Frontiers of Polymers and Advanced Materials: Emerging Technologies and Business Opportunities, Santiago, Chile, 28.09-2.10.2009. – doi: 10.1080/15421401003719787. – ISSN 1542-1406

Aspartic acid/lactic acid copolymers were synthesized under microwave radiation, without a catalyst, by bulk and solution method. The reaction was carried out also in the presence of phosphoric acid as ... więcej

Aspartic acid/lactic acid copolymers were synthesized under microwave radiation, without a catalyst, by bulk and solution method. The reaction was carried out also in the presence of phosphoric acid as the catalyst and with the use of a conventional heating. Furthermore, partial degradation of the copolymers by hydrolysis in a physiological NaCl solution and in the Lactated Ringer's solution was investigated. The structure of the products was characterized by Fourier-transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance (1H NMR). Thermalproperties of the aspartic acid/lactic acid copolymers were determined by thermogravimetry (TG) and differential scanning calorimetry (DSC), while their molecular weight was measured by gel permeation chromatography (GPC).