Branched Polyesters From Germylated and Fatty Compounds

Abstract

Here we report the synthesis of news branched polyesters derived from the trans-esterification reactions at moderate temperatures (140-190°C), either from polyglycols with different molecular weights and monomers such as germylated fatty tri-esters, or from dimethyl terephtalate and germylated fatty tri-alcohol. The structure of the resulting polymers was determined by elemental analysis, FTIR, and 13 C CP MAS NMR, and their thermal properties by thermogravimetry analysis and differential scanning calorimetry.13 C CP MAS NMR analysis indicates that the characteristic signals due to the methoxy groups of the germylated fatty tri-ester and the CH 2 OH group of germylated fatty tri-alcohol completely disappeared. This suggests that the trans-esterification process reached a nearly complete conversion. All germylated branched polyesters are insoluble in classic organic solvents due to their polydimensional structure. Thermal properties of these new materials showed that they do not present any cristallinity phase, and undergo thermal decomposition above 300°C.

OPTIMIZING THE STRUCTURE OF AMPHIPHILIC INVERTIBLE POLYMERS (AIPs) MADE OF PEGs AND FATTY COMPOUND SEGMENTS TO OBTAIN A SINGLE CRITICAL MICELLE CONCENTRATION

“…Biomaterials have been widely studied in recent years, due to their role in various relevant areas, especially in agriculture and medicine. Most of the studies concern hydrogels and fibres, due to their potential application as fertilizers, carriers and tissue engineering [1][2][3][4][5][6][7]. Other promising biomaterials are micelles, for their biologic applications in encapsulating, carrying and releasing drugs [8][9][10][11][12][13][14][15].…”