Chiral Copolymers of (R)-N-(1-Phenyl-Ethyl) Methacrylamide (R-NPEMAM) and 2-Hydroxy Ethyl Methacrylate (HEMA): Investigation of PhysicoChemical Behavior, Thermal Properties and Degradation Kinetics

By : Dibyendu S. Bag, Shilpi Tiwari, Akansha Dixit, Km. Meenu

Page No: 105-123

Abstract
In this paper, we report the microstructural investigation and influence of H-bonding on the thermal behavior e.g., glass transition (Tg) and thermal degradation of chiral copolymers of (R)- N-(1-phenyl-ethyl) methacrylamide (R-NPEMAM) and 2-hydroxy ethyl methacrylate (HEMA). The Tg increases with the increase of chiral unit content in the copolymers and then attains optimum at around 25 mole % of chiral content. Thereafter it decreases with the increase of chiral content. The effect of copolymer composition and secondary interaction associated with the H[1]bonding on the thermal properties of these copolymers was also studied. Secondary interaction, specifically H-bonding has been interpreted using FTIR analysis. The copolymers thermally degrade in three stages. The first and third stages of degradation are associated with the chiral comonomer (R-NPEMAM) whereas the second stage indicates the degradation due to HEMA unit present in the copolymer chain. The activation energies for these degradations of the copolymers have been evaluated using Flynn-Wall and Kissinger method.

Authors :
Dibyendu S. Bag, Shilpi Tiwari, Akansha Dixit and Km. Meenu
Defence Materials and Stores Research and Development Establishment (DMSRDE), G. T. Road, Kanpur-208013, India.
 

DOI: https://doi.org/10.32381/JPM.2023.40.1-2.9