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Grafting of maleic acid (MAc) on low density polyethylene (LDPE) was carried out using γ‐irradiation technique. Preactivation method was used for grafting and a maximum grafting of 2.4% was obtained. Grafted polymer(LDPE‐g‐MAc) was characterized by chemical method, Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), Thermo‐Gravimetric Analysis (TGA), Melt Flow Index (MFI), Tensile Property Measurement, Particle Size Analysis, and Hot Stage Optical Microscopy. Presence of carbonyl peak of high intensity, high acid value, and low melt flow index value confirmed grafting of MAc on LDPE. A marginal change in thermal and mechanical properties of LDPE was observed after grafting. Change in crystallization behavior of LDPE has been noticed after grafting. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 2802–2807, 2004

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High strength and Young's modulus of wet‐coagulated bodies is key to the success of a direct coagulation casting (DCC) process. The yield strength and Young's modulus of wet‐coagulated alumina bodies prepared at various concentrations of ammonium poly(acrylate) dispersant and MgO coagulating agent has been evaluated. The yield strength and Young's modulus of the wet‐coagulated bodies, prepared at a MgO concentration equivalent to react with the dispersant, increased with an increase in the dispersant concentration due to the binding of alumina particles by the Mg‐poly(acrylate) formed by the reaction between the dispersant and MgO. Addition of MgO higher than the equivalent amount to react with the dispersant increased the yield strength, Young's modulus, and brittleness of the wet‐coagulated bodies. This is due to a combination of an increase in the cohesive force between particles and a decrease in homogeneity of the particle network in the wet‐coagulated body induced by heterocoagulation of alumina and MgO particles having opposite surface charges. The high yield strength (up to 472 kPa) and Young's modulus (up to 110 MPa) achieved would facilitate easy and successful removal of the wet‐coagulated bodies even from intricate shape molds.