Research Article
Development of Castor Oil Based Poly(urethane-esteramide)/TiO2 Nanocomposites as Anticorrosive and Antimicrobial Coatings
Table 1
Physicochemical and physicomechanical characterization of resins.
| | Characteristics | Castor oil | HECA | CPEA | UCPEA-7 | UCPEA-9 | UCPEA-11 | UCPEA-13 |
| | Acid value | 0.8 | 1.7 | 8.0 | — | — | — | — | | Hydroxyl value | 149 | 8.12 | 6.15 | 4.92 | 4.5 | 3.4 | 3.2 | | Iodine value | 83 | 48 | 30.2 | 20.01 | 19.1 | 18.2 | 17.5 | | Refractive index | 1.606 | 1.611 | 1.601 | 1.603 | 1.605 | 1.607 | 1.611 | | Impact resistance (lb/in) | — | — | — | 150 | 150 | 150 | 150 | | Gloss at 45° | — | — | — | 84 | 88 | 91 | 93 | | Thickness (micron) | — | — | — | 140 | 162 | 165 | 163 | | Pencil hardness | — | — | — | 2H | 3H | 4H | 4H | | Scratch Hardness (kg) | — | — | — | 1.5 | 1.6 | 1.7 | 1.6 | | Bend test (1/8 inch) | — | — | — | Passes | Passes | Passes | Passes |
|
|
