The tensile strength of the coated beads decreased as the relative humidity increased for both 15 and 20% methylparaben levels in the polymer, as displayed in Fig. 3. The higher moisture content in polymeric films provided increased intermolecular freedom for the polymeric molecules to move, thereby lowering the tensile strength of the single bead. The Young's modulus of individual film-coated beads also decreased with an increase in the relative humidity, as seen in Fig. 4. The tensile strength and Young's modulus results demonstrated that the influence of storage relative humidity on polymer properties coincided with the changes in the mechanical properties of the coated beads. Young's modulus is a key indicator of the stiffness or rigidity of polymeric films and quantifies the resistance of the film to mechanical deformation. The moduli of a polymer generally increase with increasing chain stiffness and with increasing cohesive energy density. Moisture incorporated into the polymer matrix interposes itself between the polymer chains, resulting in a decrease in both chain stiffness and cohesive energy density. The network of non-bonded inter-chain interactions plays an especially crucial role in determining the magnitudes of the moduli of a polymer [28]. The presence of functional groups in a polymer determines the various types of interactions such as hydrophilic, van der Waals, and electrostatic. The inter-chain interaction between polymer and water results in the plasticization effect of moisture on the polymer, and therefore causes the changes in mechanical properties of the coated beads.