Advanced Materials Research Vols. 535-537

Abstract: An emission material, bis{2-(naphtha [3,4]imidazol-2-yl) pyridinato} Magnesium (MgNIP) used for organic light emitting devices, has been synthesized. The decomposition temperature was observed at 510°C and no melting transition (Tm) of MgNIP was observed up to 400°C. The emission spectrum of organic emitting device using MgNIP as emitted layer exhibits a broad maximum at 531 nm. The color of the emitted light is in the orange region in the CIE coordinate of x = 0.46 y = 0.46.

Abstract: Hydrothermal oxidation of high-level phenol containing wastewater was performed in a continuous reactor. Results show that COD removal rate increases with the increase of ratio of the amount of H2O2 supplied to the stoichiometric demand of H2O2, K; However when K is more than 1.5, the amount of H2O2 supplied does not affect COD removal rate evidently. Under sub-critical conditions, COD removal rate depends on temperature and phenol feeding concentration, and pressure does not have significant effect. Under supercritical conditions, COD removal rate depends not only on the above mentioned conditions, but on water density as well. The performance of different catalysts used in the process was compared. The experimental results show that Cu (NO3)2 is the best one in the four catalysts.

Abstract: The excellent performance of dispersion makes poly-isobutene succinimide widely used in engine's lubricating oils. But this additive has no anti-oxidation ability, anti-friction and anti-wear behaviors. In engine’s oil, it must be used with antioxidants, extreme-pressure additives and detergents. Here the authors suggested that by metallizing the succnimide, many useful lubricating chemical properties would be affiliated to this additive. The nitrogen radicals of succinimide can combine with metal ions, such as transition metal ions, forming coordination compounds. In this article, the stannous ion was chosen as coordination ion that has stronger reducibility. The stannous chloride reacts with succinimide at 170°C, forming a new complex. The lubrication chemical experiments have shown that such complex has better performances as lubricating oil's additive, for example excellent dispersing ability, higher extreme-pressure performance, and good reducibility. All the appended abilities of poly-isobutene succinimide are ascribed to the introduction of stannous ion.

Abstract: High-efficiency early strength agents were obtained which included triethanolamine, glycol and calcium nitrate. Then it was tested for concrete. Though text, we find that the compressive strength and flexural strength of the specimen, use of the high-efficiency early strength agent is greatly improved than with its much better not to use high-efficiency early strength agent. With time go on, high-efficiency early strength agent added does not make the strength of concrete worse, but better. Using SEM and XRD analysis technology text high-efficiency early strength agent by adding performances of concrete, including the degree of cement hydration, the morphology of hydration products and the composition of mineral formation. Analysis of the role of high-efficiency early strength agents from the perspective of the mechanism. Identified high-efficiency early strength agent impact on the cement hydration, for the further development of early strength agent to provide a theoretical basis.

Abstract: A solid phase Bisphenol-A Bis(Diphenyl Phosphate) (BDP) , Poly Phenoxyl Bisphenol-A Phosphate（S-BDP）was synthesized from phenyl dichlorophosphate and bisphenol-A by bulk polymerization. The influence factors on the yield and molecular weight of S-BDP were investigated by the means of orthogonal design. The structure of S-BDP was characterized with Fourier Transform Infrared Spectroscopy (FTIR). The molecular weight was determined by Gel Permeation Chromatography (GPC). Thermal stability of S-BDP was studied by Thermal Gravimetric Analysis (TGA). The results review that S-BDP was synthesized successfully and its structure is similar to BDP. Thermal decomposition temperature is much higher than commercial available flame retardant.

Abstract: Silicone modified acrylate emulsion was successfully synthesized by pre-emulsion polymerization with the monomers of butyl acrylate(BA), methyl methacrylate(MMA), acrylic acid(AA), vinyl triethoxy silane(DB-151) using APS as initiator. The influence of reaction temperature, emulsifier system and silicone concentration on emulsion properties was discussed. The results showed that the overall performances of obtained emulsion became better with the condition: the reaction temperature 75°C, 6%~8% of silicone concentration, and 3% complex emulsifier system consist of the non-ionic /anionic/amphoteric emulsifier. The study also proved that silicone modified acrylic emulsion can improve water resistance and hardness of the resin.

Abstract: Abstract: Material selection is a very important issue for design and manufacturing problems. The general grey relational analysis (GRA) has two weaknesses, namely, the weight determination depends only on expert judgments, and the qualitative indexes are simply quantified with exact number. In this paper, Combination weights are determined by combining subjective and objective weights based on maximum deviation. The qualitative indexes are fuzzy quantified through trapezoidal fuzzy number (TFN). The method is applied to the bearing material selection, and results show that the method make multi-attribute decision making more reasonable, so as to have important application value.

Abstract: Epoxy resin structural adhesives modified by flexible curing agent. Dependening on the mechanical properties of epoxy resins on the flexible curing agent content was studied. The impact fracture toughness was discussed in terms of fracture surface fractography.

Abstract: Based on the coexistence theory of slag structure, the activity model of CaO-SiO2-Fe2O3 ternary slag system was established. The effects of Fe2O3 content and basicity on the activities of CaO and 2CaO•SiO2 were investigated. The structure units of Fe2O3 in the molten slag were discussed. The results indicate the slag basicity has a significant influence on the activities of CaO and 2CaO•SiO2. The activity of CaO increases with increasing slag basicity, while the activity of 2CaO•SiO2 increases with the increasing of slag basicity when the basicity is less than 1.8, which reaches the maximum value when the basicity is 1.8. In another word, when the slag basicity exceeds 1.8, the activity of 2CaO•SiO2 decreases with the increasing of slag basicity. In addition, the activities of CaO and 2CaO•SiO2 can be decreased by Fe2O3. Moreover, when the slag basicity is higher than 2.0, the activity of 2CaO•SiO2 increases slightly with the increasing of Fe2O3 content. The main structure units of Fe2O3 in molten slag are closely related to the slag basicity.

Abstract: Taking different types of graphite as raw materials ， polycrystalline diamond powder is prepared by shock wave synthesis through copper to absorb and transfer the heat in the article. Yield and abrasion resistance performance are tested, and impaction of graphite crystallite structure on the yield and abrasion resistance performance is researched. As the result, diamond yield and abrasion resistance synthesized from scale graphite is not as good as from earthy graphite. It is easy for polycrystalline diamond powder synthesized from artificial graphite which crystallite has parallel coke-base to graphitize and difficult to get diamond. Yield of artificial graphite which crystallite has disorderly carbon black base is higher than that of earthy graphite, there are more pores for the first baked artificial graphite of carbon black base, the abrasion resistance performance of synthesized diamond is worse than earthy graphite, and the abrasion resistance performance of the second baked polycrystalline diamond powder is better than earthy graphite.