Abstract: A series of castor oil polyurethane poly (methyl acrylate) semi interpenetrating polymer network (SIPN CO PU PMA) were prepared from castor oil, toluene diisocyanate and methyl acrylate. The SIPN polymers obtained were characterized by thermal, chemical and mechanical properties such as tensile strength, elongation and hardness (Shore A) and compared with each other. Tensile strength and hardness (with inverse of elongation) increase in the direction of increasing isocyanate ratio and methyl acrylate content. The apparent densities were also determined and compared. The adhesive properties were applied with respect to iron to aluminum bonding. The adhesives based on IPN PU PMA were prepared and tested as adhesives for metals. The results showed that the adhesives have effective adhesion power that they can be used in a practical project.
 

Keywords: Castor oil, methyl acrylate, toluene diisocyanate, tensile strength, adhesion power