Novel Concept of Non-Debye Dipole Relaxation Processes for the Interpretation of Physical Origin of Dielectric Loss in the Glass Formers, Drugs, Polymers and Plastic Crystals

G. Govindaraj

paper

Novel Concept of Non-Debye Dipole Relaxation Processes for the Interpretation of Physical Origin of Dielectric Loss in the Glass Formers, Drugs, Polymers and Plastic Crystals

arXiv:1608.05304

Abstract

The physical origin of dielectric loss is shown to be sum of n number of subunits relaxation of a molecule, where n=1,2,3.. For each subunit relaxation, the idea of intermolecular dipole-dipole interactions triggered non-Debye dipole, ( $G$ ) $_{n}$ =((1-g $_{d}$ ) $G$ $_{0}$ ) $_{n}$ , and the ensuing dual dipole ( $G$ $_{\pm}$ ) $_{n}$ =( $G$ $_{0}$ $\pm$ $G$ ) $_{n}$ , relaxation processes is proposed, where $G$ $_{-}$ =g $_{d}$ $G$ $_{0}$ , $G$ $_{+}$ =(2-g $_{d}$ ) $G$ $_{0}$ , and $G$ $_{0}$ is a Debye dipole. Each subunit motion is statistically highly independent process and discriminated by Debye and non-Debye relaxation (NDR) time, where g $_{d}$ is an exponent 0<g $_{d}$ <1 and signifies interaction strength with a redistribution and conservation of Debye dielectric loss energy. The proposed concept provides a new insight for the NDR and discloses the physical origin of $α$ , $β$ , $γ$ , $δ$ relaxations and excess wing of glass formers, plastic crystals, drugs, etc., with an excellent agreement with experimental results.

(i) glycerol (ii) 2-ethyl-1-hexanol results in the paper, Supplement materials on interesting features of the proposed model and further results of (1) 2-butanol (2) 2-Methylpentane 2,4 diol (3)1-proponal (4) Ethanol (5) Ketoprofen (6)Propylene carbonate (7) Ortho-carborane (8)Meta-carborane (9)1-cynoadamantane (10) Pentachloronitrobenzene