Research Article
Studies on Thermal and Photoisomerization Properties of Polyesters Possessing Azomethine Moieties in the Back Bone
@INPROCEEDINGS{10.4108/eai.7-12-2021.2314646, author={Vini R and Murugavel C}, title={Studies on Thermal and Photoisomerization Properties of Polyesters Possessing Azomethine Moieties in the Back Bone}, proceedings={Proceedings of the First International Conference on Combinatorial and Optimization, ICCAP 2021, December 7-8 2021, Chennai, India}, publisher={EAI}, proceedings_a={ICCAP}, year={2021}, month={12}, keywords={aromatic polyesters azomethine bisphenols thermal properties photoisomerization}, doi={10.4108/eai.7-12-2021.2314646} }- Vini R
Murugavel C
Year: 2021
Studies on Thermal and Photoisomerization Properties of Polyesters Possessing Azomethine Moieties in the Back Bone
ICCAP
EAI
DOI: 10.4108/eai.7-12-2021.2314646
Abstract
Various aliphatic and aromatic diacidchlorides were solution polycondensed with azomethine diol, [(4-(4-hydroxy-3-ethoxy phenyl) iminomethyl)] phenol (HEPIMP), in the presence of triethylamine catalyst at room temperature to produce a series of aliphatic and aromatic azomethine polyesters. Fourier Transform IR and NMR spectroscopy techniques were utilised to analyse the diol monomer HEPIMP. UV-Visible spectroscopy was used to investigate their photoisomerization behaviour in solution. The structure and thermal behaviour of prepared aliphatic and aromatic azomethine polyesters were studied. Limiting oxygen index values were calculated from the Van Krevelen equation to investigate the self-extinguishing character of the synthesised azomethine polyesters, and it was noticed that aromatic polyesters have greater Limiting Oxygen Index value than aliphatic polyesters. The pre exponentional factor (A) and activation energy (Ea) were determined using the Arrhenius, Horowitz-Metzger and Broido models for studying decomposition kinetics.
