A Comparative analysis of PESC and PPSC copolyesters: Insights into viscosity, thermal behavior, crystallinity, and biodegradability
A. Kesavan,
T. Rajakumar,
M. Karunanidhi,
A. Ravi,
P.A. Vivekanand,
P. Kamaraj,
Natarajan Arumugam,
S. Hari Kumar,
Karthikeyan Perumal,
Sinouvassane Djearamane,
Mohammod Aminuzzaman,
Ling Shing Wong,
Saminathan Kayarohanam
Affiliations
A. Kesavan
Department of Chemistry, Kalaignar Karunanidhi Government Arts College, Thiruvannamalai, India
T. Rajakumar
Department of Chemistry, Kalaignar Karunanidhi Government Arts College, Thiruvannamalai, India
M. Karunanidhi
Department of Chemistry, Government Arts College, Udumalpet, India
A. Ravi
Department of Chemistry, Kalaignar Karunanidhi Government Arts College, Thiruvannamalai, India; Corresponding author. Department of Chemistry, Kalaignar Karunanidhi Government Arts College, Thiruvannamalai, India.
P.A. Vivekanand
Centre for Catalysis Research, Department of Chemistry, Saveetha Engineering College, Thandalam, Chennai-602105, India; Corresponding author. Centre for Catalysis Research, Department of Chemistry, Saveetha Engineering College, Thandalam, Chennai-602105, India.
P. Kamaraj
Department of Chemistry, Bharath Institute of Higher Education and Research (BIHER), Chennai 600073, India
Natarajan Arumugam
Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia
S. Hari Kumar
Chemistry Division, Department of Humanities and Science, Rajalakshmi Institute of Technology, Chennai 600124, Tamilnadu, India
Karthikeyan Perumal
Department of Chemistry and Biochemistry, The Ohio State University, 151 W. Woodruff Ave, Columbus, OH 43210, USA
Sinouvassane Djearamane
Faculty of Science, Universiti Tunku Abdul Rahman, Jalan universiti, Bandar Barat, Kampar 31900, Malaysia; Biomedical Research Unit and Lab Animal Research Centre, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai 602 105, India; Corresponding author. Faculty of Science, Universiti Tunku Abdul Rahman, Jalan universiti, Bandar Barat, Kampar 31900, Malaysia.
Mohammod Aminuzzaman
Faculty of Science, Universiti Tunku Abdul Rahman, Jalan universiti, Bandar Barat, Kampar 31900, Malaysia
Ling Shing Wong
Faculty of Health and Life Sciences, INTI International University, Nilai, 71800 Malaysia
Saminathan Kayarohanam
Faculty of Bioeconomics and Health sciences, University Geomatika Malaysia, Kuala Lumpur 54200, Malaysia
The study examined various properties of synthesized copolyesters PESC and PPSC. Inherent viscosities of the copolyesters, measured in 1,4-dioxane at 32 °C, were 0.65 dL/g for PESC and 0.73 dL/g for PPSC. Fourier-Transform Infrared Spectroscopy (FT-IR) revealed distinct absorption bands associated with ester carbonyl stretching, C–H bending vibration, C–H group symmetry stretching, and C–O stretching vibrations. 1H and 13C Nuclear magnetic Resonance (NMR) spectroscopy were used to identify specific protons and carbon groups in the polymer chain, revealing the molecular structure of the copolyesters. Differential Scanning Calorimetry (DSC) identified the glass transition, melting, and decomposition temperatures for both copolyesters, indicating variations in the crystalline nature of the copolymers. XRD Spectral studies further elaborated on the crystalline nature, indicating that PPSC is less amorphous than PESC. Biodegradation analysis showed that PESC degrades more quickly than PPSC, with degradation decreasing as the number of methylene groups increase. Scanning Electron Microscopy (SEM) images depicted the surface morphology of the copolyesters before and after degradation, revealing a more roughened surface with pits post-degradation. These findings provide comprehensive insights into the structural and degradable properties of PESC and PPSC copolyesters.
