Abstract

Paper printed matter of vehicle registrations was analyzed to find the content of synthetic fiber, polyester present in it by the sulfuric acid method 75% by weight. The total content of the synthetic fiber, polyethylene terephthalate (PET), present in it was found to be 36.3% by weight on dry mass of the finished product. Fluorescent fibers visible only in the ultraviolet were contained in the paper mass and were counted to be 0.10%w/w red fibers and 0.13%w/w green fibers. The endothermic peak in the DSC curve of PET present was observed at 261.7 ˚C or 534.85K. The FT-IR spectrum of the sample showed the ester group at 1728.45cm^-1. The mechanical properties of the paper sample of vehicle registrations were determined, like its puncture resistance at 848KPa. The folding endurance was found to be greater than 40,000 in the machine direction and greater than 20,000 in the counter machine direction with 0.5Kg applied tension. The tensile strength of the dry specimen was determined to be 86.9N in the machine direction and 85.8N in the counter machine direction. The tensile strength of the wet specimen was found to be 30.5% of the tensile strength of the dry specimen of the paper sample of vehicle registrations. The band gap of the material of paper vehicle registrations was estimated to be 1.165616495929150eV for permitted indirect transitions using the Kubelka-Munk function and reflectance measurements.

Keywords:Sulfuric acid method 75% by weight; Mechanical properties of paper; Tensile strength; Bursting strength; Tearing resistance; Differential scanning calorimetry (DSC); Polyethylene terephthalate (PET); Reflectance graph; Band gap