Synthesis, characterization and ring opening activity of barium mercaptoacetate towards ε-caprolactone
Journal
Polymer Bulletin
Journal Volume
76
Journal Issue
10
Pages
5381-5397
Date Issued
2019
Author(s)
Abstract
A novel alkaline earth metal salt such as barium mercaptoacetate (Ba-MA) was successfully synthesized and characterized by various analytical techniques such as FTIR spectroscopy, UV–visible spectroscopy, XRD, particle size analysis and SEM. Further, its application towards the ring opening polymerization of ε-caprolactone (CL) as a novel initiator was tested at two different experimental conditions such as monomer to initiator ratio [M/I] variation and temperature variation under nitrogen atmosphere with mild stirring condition. The poly(caprolactone) (PCL) formation in the presence of Ba-MA was confirmed by measuring the melting temperature (Tm), degradation temperature (Td), XRD and GPC of PCL. The Tm of PCL varied between 68.4 and 71.6?°C while increasing the [M/I]. The chemical structure and functional groups of PCL were confirmed by NMR spectroscopy and FTIR spectroscopy, respectively. The band gap (Eg) value increased with the increase in [M/I] ratio due to the decrease in Ba content. ? 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
Subjects
Alkalinity; Atmospheric temperature; Barium compounds; Energy gap; Fourier transform infrared spectroscopy; Nuclear magnetic resonance spectroscopy; Particle size; Particle size analysis; X ray diffraction; Alkaline earth metal salts; Band gap energy; Degradation temperatures; Experimental conditions; Nitrogen atmospheres; Stirring conditions; Temperature variation; Visible spectroscopy; Ring opening polymerization
SDGs
Type
journal article