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A natural resource-based oleic acid was epoxidised to produce epoxidised oleic acid (EOA). The epoxidation reaction was confirmed by different analyses. Then, EOA was reacted with nitrogenand sulphur-containing compounds such as glycine (GLY) and thioglycolic acid (TGA) to prepare EOA-GLY and EOA-TGA compounds, respectively. The EOA, EOA-GLY, and EOA-TGA compounds were evaluated as corrosion inhibitors (CIs) for mild steel in different coating formulations. Corrosion resistance tests and weight loss measurements of the coated steel panels were carried out, in addition to the physico-chemical and mechanical measurements. It was found that the coating formulations containing the prepared EOA-TGA inhibitor with a concentration (0.04 g/100 g coating) imparted higher protection for steel surface against corrosion and also competed efficiency known commercial CI at the same concentration. Also, the efficiency of the commercial and prepared inhibitors was increased in the following order: EOA-TGA > EOA-GLY > commercial inhibitor > EOA.

Cement kiln dust (CKD) is a residue produced during the manufacture of cement that contains hazardous solid waste of high toxicity that affects the environment and public health. In this study, the possibility of using cement waste as a filler in the plastic and rubber industry was studied. Different concentrations of (CKD) and gamma irradiation on the mechanical, thermal stability of the prepared composites sheets were investigated. Different concentrations of (CKD) 10, 15, 20, 30, 35, and 40 wt % were prepared with double screw extrusion by mixing waste polyethylene (WPE), de-vulcanized rubber (DWR), and EPDM rubber. These prepared composites were irradiated with doses 25, 50, 75, 100, and 150 kGy to study the effect of radiation on the physical, mechanical properties, and thermal stability of the prepared composite sheets. The prepared composite sheets were characterized and verified by FTIR and soluble fractions. The morphology of the composite sheets was investigated by SEM. Mechanical and thermal properties were investigated to evaluate the possibility of its application in the plastic and rubber industry.

A CRYLONITRILE butadiene rubber (NBR) is commonly used as oil and fuel resistant in industrial applications. This study is carried out to investigate the effect of adding some acrylate monomers and oligomers that was used by constant concentration, namely (0.02 mol /100 g of rubber) to improve the physical and mechanical properties of (NBR) reinforced by 30 phr carbon black and mixed in a rubber rol mill, exposed to gamma radiation (doses from 25 to 150 kGy). The results indicated that the acrylate monomers increase the tensile strength (TS) at lower doses up to 50 kGy, while the oligomers increase the TS at higher doses more than 50 kGy. On the other hand, the physical properties such as soluble fraction, swelling ratio and crosslinking density showed dependence on the specific unsaturation (SU) of monomer and oligomer. The thermal stability of the composites tested by thermogravimetric analysis (TGA) recorded comparable values except NBR modified by urethane diacryalte (UDA) have the lowest value.