Plasticizers are an important class of low molecular
weight non-volatile compounds that are widely used in
polymer industries as additives [1]. The primary role of
such substances is to improve the flexibility and processing
of polymers by lowering the second order transition
temperature, the glass transition temperature (Tg). The
council of the IUPAC (International Union of Pure and
Applied Chemistry) defined a plasticizer as “a substance or
material incorporated in a material (usually a plastic or
elastomer) to increase its flexibility, workability or distensibility”.
These substances reduce the tension of deformation,
hardness, density, viscosity and electrostatic charge of
a polymer, at the same time increasing the polymer chain