Abstract
ABSTRACTPoly(imido-ester-amides) (PIEAs) derived from three new asymmetric dicarboxylic acids containing an imide and ester groups and an aminoacidic moiety (glycine, L-alanine or L-valine) and a wholly aromatic silicon-containing diamine were synthesized according to the Yamazaki method. PIEAs were characterized by spectroscopic methods including 29Si NMR and elemental analysis, and the results were in agreement with the proposed structures. The thermal properties, glass transition temperature (Tg) and thermal decomposition temperature (TDT), were determined and the results showed that both parameters decreased when the aliphatic side chain provides by the amino acids increased, due to the higher free volume between the chains, which minimizes the interactions between them. Two of the PIEAs showed transparency according to the UV-vis spectra, due to that the side chains act as chain spacers, in front of PIEA-a including glycine as aminoacidic moiety, without side aliphatic group, which did not show transparence.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
