Tri-functional oligomeric polyesters prepared from new dicarboxylic acids containing several amino acids residues by Higashi methodology: synthesis, characterization, and study of solubility and thermal behavior

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dc.contributor.authorTundidor-Camba, Alain
dc.contributor.authorTagle, Luis H.
dc.contributor.authorTerraza, Claudio A.
dc.contributor.authorRivera, Jorge
dc.contributor.authorColl, Deysma
dc.contributor.authorOrtiz, Pablo A.
dc.date.accessioned2025-01-20T23:56:16Z
dc.date.available2025-01-20T23:56:16Z
dc.date.issued2021
dc.description.abstractThe synthesis of polyfunctional aliphatic oligomeric polyesters (poly(ether-imido-esters;PEIEs) containing several amino acid residues is described, and their thermal properties and solubility behavior were studied. The new symmetrical monomeric dicarboxylic acids were synthesized using 4-nitrophthalonitrile as starting material, which reacted with bisphenol-A or bis(4-hydroxyphenyl)diphenylmethane. Then, the tetranitrile derivatives were hydrolyzed to the tetracarboxylic acids and dehydrated to the respective dianhydrides. Finally, these compounds reacted with the amino acids glycine orL-alanine to obtain the aliphatic dicarboxylic acid monomers.PEIEs were obtained by Higashi methodology from these monomers and bisphenol-A, characterized by elemental analysis, NMR and IR, and the results were in agreement with the structures. The materials were soluble at 25 degrees C in several aprotic polar organic solvents and some in CHCl(3)and THF. In agreement with the viscosity and SEC results,PEIEswere oligomers with degree of polymerization of four and six, and Mw and Mn between 7370-9790 g/mol and 3680-4850 g/mol, respectively. The samples showed lowT(g)values (124-160 degrees C), associated with important structural flexibility promotes by dicarboxylic acid monomers. Despite this, this parameter depended of the aminoacidic residue nature in the sense that when the volume of it increased, theT(g)also increased due to a decrease in the free rotation that negatively affects the segmental movements of the chains. This effect was also observed when the side groups of the diphenol moiety of the dicarboxylic acid monomers increase from methyl to phenyl. The recorded TDT(10%)values from the TGA analysis (334-457 degrees C) do not allow to consider these samples as thermoset materials. In this sense, it was possible to observe an average increase of 8-13 degrees C and 23-28 degrees C when the lateral group volume of the amino acid residues and of the diphenol moiety are increased, respectively.
dc.description.funderFONDECYT
dc.fuente.origenWOS
dc.identifier.doi10.1007/s00289-020-03321-1
dc.identifier.eissn1436-2449
dc.identifier.issn0170-0839
dc.identifier.urihttps://doi.org/10.1007/s00289-020-03321-1
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95143
dc.identifier.wosidWOS:000554322800002
dc.issue.numero8
dc.language.isoen
dc.pagina.final4225
dc.pagina.inicio4205
dc.revistaPolymer bulletin
dc.rightsacceso restringido
dc.subjectOligomeric poly(ether-imido-esters)
dc.subjectHigashi methodology
dc.subjectSolubility
dc.subjectThermal analysis
dc.titleTri-functional oligomeric polyesters prepared from new dicarboxylic acids containing several amino acids residues by Higashi methodology: synthesis, characterization, and study of solubility and thermal behavior
dc.typeartículo
dc.volumen78
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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