Lignin is a heterogeneous biopolymer of extreme complexity, whose exact chemical composition is not known, hence recent efforts at developing lignin-based polymer blends and composites have lead to conflicting reports regarding the benefits of lignin incorporation into polymers [9]. Also, the extensive cross-linking and strong intermolecular interactions prevent its utilization in solid material system. Consequently, lignin is often deficient in areas where homogeneity of chemical functionalities and molecular weight distribution is required. It is therefore essential that rigorous intensive research on lignin modification and application would be of utmost importance. Moreover, studies by Simionescu et al. [10] showed that significant lignin loads could be incorporated into the epoxy resin whilst still maintaining good electrical
(volume and surface resistivity, dielectric constant, loss in dielectric tangent angle and dielectric rigidity) and mechanical properties, and high impact toughness compared to the lignin-free phenol epoxy resins.