Bio-acrylic palm oil based polyol was synthesized and characterized for polyurethane (PU) coating. In this project, acrylation of palm oil based polyol was done by using different amount of 2-hydroxyethyl methacrylate (HEMA) along with styrene mole ratio at 1:0.5:2, 1:1:2 and 1:1.5:2. The result shows that the increasing amount of HEMA content has increased the hydroxyl value. The characterization of bio-acrylic palm oil based polyol carried out by IR spectroscopic analysis and hydroxyl value. Coated surfaces were then characterized for the drying and gelling time, contact angle test and FTIR analysis were also reported. As the NCO/OH ratio of the coatings increased, there were progressive increased in mechanical and anticorrosive properties for all the coatings. Overall, this study showed that the material holds promise to be used as an effective surface coating compound by designing the formulation based on the desired performance. � 2019 Trans Tech Publications, Switzerland.

Aluminum alloy 2024-T3 was treated by two different methods of surface treatments i.e. by alkaline etching and warm water treatment followed by silanization method in order to enhance the adhesive bonding. The effects of both the substrate surface condition and the adhesive properties on single-lap shear resistance were analysed. Three different formulation of polyurethane adhesive by varying the NCO:OH ratio which were prepared from polyol based on polycaprolactone (PCL)/palm kernel oil (PKO) with an aromatic and cycloaliphatic diisocyanate. Moreover, wettability tests were performed in order to evaluate the effect of all parameters mentioned above on the substrate/adhesive interaction. Surface treatment with warm water and ?- GPS gives better wettability and adhesive bonding compared to alkaline etching surface treatment. � (2013) Trans Tech Publications, Switzerland.