By Taufiq Yap Yun Hin
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Extra info for Advanced Materials and Engineering
The pH doesn’t give any effect for this, because, both solutions had approximately equal pH values. Only the possible reason is that higher reactivity of K+ ions, which raise the chemical reaction to give higher swell volume. Thus, powder bentonite gives higher swell volume than their granular form in all experimented temperatures. Hence, powder form shows a shorter period of temperature dependency to achieve a constant level of swelling than granular form. In addition, two stage of swelling behavior was observed in all cases of powder and granular bentonite as in NaCl solution.
A. Petroleum based polyurethanes are contributing major portions in the world requirement. To overcome the environmental issues and price adaptability, there is always a massive demand of utilization of renewable resources for polyurethane synthesis with comparable physico-chemical properties. Castor oil is the only major natural vegetable oil that contains a hydroxyl group (-OH) and unsaturated double bonds (C=C) in its organic chain and therefore can be employed with or without modification due to the excellent properties derived from the hydrophobic nature of triglycerides.
1281370046) from the Scientific Research Foundation for the high-ranking talent of Jiangsu university. References  S. Kaewta, L. G. James, Solid bronsted acid catalysis in the gas-phase esterification of acetic acid, Ind. Eng. Chem. Res. 46 (2007) 7050–7056. Z. J. Eli, A green approach for the synthesis of long chain aliphatic acid esters at room temperature, J. Mol. Catal. A: Chem. 279 (2008) 159–164. R. R. Modukuri, A. Ratnamala, et. al. A Simple, Efficient, Green, Cost Effective and Chemoselective Process for the Esterification of Carboxylic Acids, Org.
Advanced Materials and Engineering by Taufiq Yap Yun Hin