Papers by Keyword: Differential Scanning Calorimetry Analysis

Abstract: Gossypol (GP) is a kind of poorly water-soluble polyphenolic compounds. In this study, freeze dried gossypol nanosuspensions (GP-NS) were prepared by high-pressure homogenization and Freeze-drying technique. Bovine serum albumin (BSA) and D-alpha-tocopheryl polyethylene glycol succinate (TPGS) were used as stabilizing agents for the nanosuspensions while mannitol were used as lyophilized protecting medium. The physicochemical characteristics of the GP-NS were investigated when it was found that the mean particle size and zeta potential of the GP-NS were 217±23 nm and-21.4±2.7 mV, respectively, and the saturation solubility was 586.48±23.03 μg.mL^-1. Differential scanning calorimetry and X-Ray Diffraction indicated that GP was in a crystalline state in nanosuspensions. GP-NS with a small particle size, and high saturation solubility, can be produced by the method described in this study.

Abstract: Silicone modified acrylic polymer dispersion was prepared by blending methoxy functional silicone intermediate resin with acrylic polyol resin in different ratios. The physical, mechanical and thermal properties were investigated. The physical property of the blend has been carried out by using Kruss G40 contact angle measuring system, mechanical property of the blend evaluated by using impact resistance tester and adhesion tester (Cross Hatch- Cutter) and thermal analysis has been carried out by using Metler Toledo thermal analysis system DSC821. It is found that the incorporation of 50% silicone resin with 50% acrylic resin gives good adhesion on metal substrate (mild steel substrate) and optimal cross-linking is achieved.