Advanced Materials Research Vols. 535-537

Abstract: This paper studies the influence of Double (L- diethyl tartrate) boric acid ester (compatibilizer B) on the compatibility between PPO and PA66. Through the mechanical properties, Molau experiment, scanning electron microscope and tem analysis test method, it is proved that Double (L- diethyl tartrate) boric acid ester can be used as a new reactive compatibilizer in PPO/PA66 plastic alloy.

Abstract: Using the capillary rheometer to study the effect of shear rate, shear stress and temperature of Japanese and domestic PPS resin( fiber grade) on the apparent viscosity, index of non-Newtonian and viscous flow activation energy.The results show that with the increase of shear rate and temperature,compared to the domestic sample, Japanese sample has higher apparent viscosity, smaller non-Newtonian index(n),lower viscous flow activation energy,and smaller sensitivity to temperature.The Japanese specimens are suitable for processing and forming under high shear rate and spinning speed, but the domestic specimens are suitable for processing and froming under low shear rate and spinning speed.

Abstract: In an electrospraying process, the polymer solution interacts with the electric field. Charged polymeric solutions causing polymer liquids to move, break into drops or spray into fine droplets. Electrospraying has the ability to generate very small & uniform droplets of polymeric solution. It is envisaged that electrospraying is a promising technology to coat a polymer on surface at submicron range. The polymer aggregation is important while coating. The process parameters including applied voltage, nozzle-collector distance, solution flow rate, and solution concentration play an important role in polymer droplets aggregation on surface. This research paper investigates the effect of applied voltage on aggregation of polymer droplets.

Abstract: Coke plant wastewater is high concentration organic wastewater from the process of making coke, purifying coal gas and recovering the coke products. At present this wastewater was treated by biochemical process, but it is difficult to meet the effluent water discharge standards and recycling because of difficult degradable organic matter. The study focused on removing these matters to develop a kind of new flocculation- poly-silicate magnesium ferric sulfate (PFMSSB) in advanced treatment of coke wastewater. The results showed that the treatment effect of PFMSSB was better, COD content was down to about 50 mg/L and COD removal rate was up to 45%. This disposing process is simple and the cost is reduced greatly.

Abstract: We systematically performed first-principles investigations of the structural properties, electron energy band, and densities of states (DOS) for ThO2. All calculations were carried out using the local density approximation (LDA), generalized gradient approximation (GGA), LDA+U, and GGA+U approaches. We also compared our findings with experimental data and other calculations. The lattice parameter obtained using the GGA+U agrees well with the experimental value.

Abstract: Aluminophosphate molecular sieves (AlPO₄-5s) with fibrous morphology were readily prepared via hydrothermal method at 180 °C with the initial molar ratio of Al(OiPr)₃: H₃PO₄: TrPA: HF: H₂O as 1: 0.83: 1: 0.8: 70. The morphology and structure of the prepared AlPO₄-5s were characterized by XRD, SEM, TEM and nitrogen sorption measurement. The morphology development and structure evolution mechanism were proposed.

Abstract: A series of 4-nitrochalcones (compounds 1-10) are synthesized and characterized. The products synthesized are evaluated for their cytotoxic activities in vitro. Among the compounds tested, (E)-3-(4-nitrophenyl)-1-(4-nitrophenyl)prop-2-en-1-one (1) showes the favorable in vitro cytotoxic activity against human nasopharyngeal epidermoid tumor cell line KB.

Abstract: Based on the composite dielectric polarization theory, dielectric permittivity, dissipation factor and loss angle tangent of hydrated paraffin versus temperature and power supply frequency were analyzed. The effect of different water contents in paraffin on its dielectric characteristics was also studied. The more the water content in hydrated paraffin, the greater the dielectric parameters, dissipation factor can reach 1.48 when the water contents was 15%. They can provide references for theoretical researches and industrial applications on removal of paraffin that condense on the interior walls of oil pipes in oil extraction by electric heating method.

Abstract: A novel theoretical model was constructed to predict the impact sensitivity of 44 heterocyclic nitroarenes. The optimal subset of the molecular structures descriptors were selected by genetic algorithm (GA). The multiple linear regression (MLR) was then applied to build a prediction model of impact sensitivity for the 44 compounds. The correlation coefficients (R2) together with correlation coefficient of the leave-one-out cross validation (Q2CV) of the model is 0.928 and 0.865, respectively. The new model is highly statistically significant, and the robustness as well as internal prediction capability of which is satisfactory. The predicted impact sensitivity values are in good agreement with the experimental data.

Abstract: The effect of ball-to-powder weight ratio on the fabrication of Nb-base powder via ball milling was studied. The structural evolution and morphology of the powders were investigated using LPSA, XRD and SEM techniques. The results indicate that increasing the BPR leads to decreases in particle size and grain size of powders. For a given milling time of 18 h and rotational speed of 250 rpm, ball milling with BPR of 20:1 produces an ultrafine powder with a mean particle size of about 2 μm and a grain size of about 20 nm. A 30:1 of BPR increases the useless collision frequency during ball milling, leads to a serious fraying of milling balls.