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Color changes after polymerization and aging of dental resin composites are perceptible. If these color changes can be predicted by the shade of material before polymerization or clinical use, color matching of composites with teeth would be improved. The objectives were to measure the...
The devulcanization of the butyl rubber based tire-curing bladder was carried out with a grooved barrel ultrasonic extruder. The devulcanized rubber was blended at different ratios with the carbon black filled virgin butyl rubber and cured. The rheological and mechanical properties, as well as...
Spinel solid solutions of CuFe 2 O 4 and Cu 1− x Zn x Ga 0.1 Fe 1.9 O 4 with (0.0 ≤ x ≤ 0.5) are synthesized. Crystallographic phase transformation from tetragonal-to-cubic occurred at x = 0.2. The derived structural parameters manifest that Zn occupies the tetrahedral A -site while Cu and...
The effect of polyethylenimine (PEI) on preparing macroporous ZrO 2 materials via heterocoagulation coating process was investigated, using ZrO 2 nanoparticles as the building materials and polystyrene spheres as the organic templates. When PEI was applied to modify the surface charge of ZrO 2...
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