Dielectric Relaxation Behaviour of Glycidyl Methacrylate (GMA) and 3-methoxy-4-(2-hydroxy-3-methacryloloxy-propoxy) Benzaldehyde (MH) and their copolymers.

Abstract

Research has been done on the dielectric characteristics of GMA-MH and its copolymers at a wide range of frequencies, including 100Hz to 100kHz and room temperature to 180oC.  It has been investigated how the dielectric loss and dielectric constant change with frequency, and temperature. The dielectric constant falls with temperature and frequency increases. The data was computed and examined by the AC Conductivity. The AC conductivity rises with rising frequency and temperature. Glycidyl methacrylate copolymers with epoxy functional groups as pendant units have become increasingly important in a variety of applications. For instance. The epoxy pendant group can enhance the mechanical and electrical characteristics of coatings and biomaterials. The present report is centred on the methodical examination of GMA, MH, and their copolymers' dielectric properties with respect to temperature and frequency. Two relaxation peaks are present, one at a temperature marginally above room temperature(β-relaxation) and the other at a higher one(α- relaxation). The main chain segments' micro Brownian movement (α- relaxation) and the epoxy and carbonyl pendant groups are believed to be the causes of the peaks. MH is restricted to a single set of i.e.,    the α-relaxation peaks. The dielectric property consistently decreases as the non-polar MH content rises. The results are discussed by studying the segmental motion of the main chain and increasing the MH content in copolymers and pendant groups within the copolymer.