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Citation: LIAKATHALIKHAN Faize, SIVAGURUNATHAN Periyasamy. Dielectric Relaxation ofMethyl Methacrylate and Ethyl Methacrylate on Complexation with Phenols[J]. Acta Physico-Chimica Sinica, ;2007, 23(04): 513-516. doi: 10.1016/S1872-1508(07)60033-3 shu

Dielectric Relaxation ofMethyl Methacrylate and Ethyl Methacrylate on Complexation with Phenols

1.
Department of Physics, Annamalai University, Annamalai Nagar, Tamil Nadu-608 002, India

Received Date: 8 October 2006
Available Online: 12 March 2007

Dielectric absorption studies of H-bonded complexes of methyl methacrylate (MMA) and ethyl methacrylate (EMA) with p-cresol, p-chlorophenol, 2,4-dichlorophenol, and p-bromophenol were studied at microwave frequency 9.37 GHz in dilute solution of carbon tetrachloride at 308 K. Different dielectric parameters like dielectric constant ε' and dielectric loss ε'' at microwave frequency, static dielectric constant ε0 and dielectric constant ε∞ at optical frequency were determined. The validity of the single frequency equation of Higasi et al. for multiple relaxation time τ(1) was found to be a function of the hydrogen bonding strength of phenolic hydrogen, whereas the group rotation relaxation time τ(2) was a function of the steric interaction of proton donor. The relaxation time was the maximumat 50:50 (molar ratio) of methacrylates with phenols.
- Acrylic esters; Phenol derivatives; Dielectric relaxation; X-band microwave
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