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제안 방법
- Presumably, an introduction of thickener to the continuous phase is likely to achieve this goal. In this study, the open microcellular fbams combining some thick eners into the conventional formulation of styrene and water system were prepared via highly concentrated water- in-oil emulsion followed by polymerization. Scanning electron microscopy (SEM) was used to observe the cell size as well as the microcellular morphology.
- The average cell size of each sample could be obtained from the image anal ysis technique that statistically evaluates a number of cell sizes of SEM micrographs. Rheological properties of oil phase solutions, aqueous phase solutions and emulsions thereof were measured at 25°C in a controlled stress rhe ometer (MCR 300; Physica) to investigate the solution vis cosity of each phase, the yield stress and the storage modulus depending on thickener concentration and agi tation speed. The compression tests were performed with a universal testing machine (UTM; Lloyd LR 50 K) to eval uate the compression properties of the foams.
- Since the cell size of polymerized foam is rel atively simple to be measured, it is rather easier to get a relationship between the rheological properties and the drop size of emulsion, provided that the cell size of result ant foam can directly be used as the drop size of HIPEs. Steady shear, creep recovery and oscillatory shear tests were carried out on a series of HIPEs.
- Rheological properties of oil phase solutions, aqueous phase solutions and emulsions thereof were measured at 25°C in a controlled stress rhe ometer (MCR 300; Physica) to investigate the solution vis cosity of each phase, the yield stress and the storage modulus depending on thickener concentration and agi tation speed. The compression tests were performed with a universal testing machine (UTM; Lloyd LR 50 K) to eval uate the compression properties of the foams. The platen speed was fixed as 0.
대상 데이터
- It is suspected that the outstanding properties of ODVC fbams come from a nano-structured microcellular composite. The organoclay, ODVC (octadecylvinylbenzyl clay), was prepared from an ion exchange reaction between Na+ MMT and dimethyloctadecylvinylbenzyl ammonium bromide. Thus, ODVC participates in the polymerization of styrene.
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