Fourier-transform infrared spectroscopy (FTIR) of the samples (UMP and WMP) was studied using FTIR spectrophotometer (PerkinElmer Spectrum Version 10.4.00) for the absorbance range 4000-450 cm -1 , . The thermal (heat change) analysis of the samples was analyzed using DSC (DSC 200 F3 Maia Differential Scanning Calorimeter, NETZSCH) . We bought the DSC crucible and lid set from NETZSCH Technologies India Pvt. Ltd. in Chennai (6.239.2-64.51.00). Each sample was placed in its own DSC crucible, weighed (5 mg), and then immediately sealed with its corresponding lid. Using an empty crucible as a reference, the DSC apparatus ran one sample at a time. The experiment was conducted at a heating rate of 10 K/min with an inert nitrogen flow of 50 mL/min for a temperature range of -10 ºC-320 ºC . The CHNS (Carbon, Hydrogen, Nitrogen, Sulphur) elemental analysis of the samples was performed using CHNS elemental analyzer (Elementar Analysensysteme, Germany/Vario EL) , .