Materials Literature
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Intramolecular flame-retardant PET resins were prepared via copolymerization reaction by using reactive halogen-free flame retardant CEPPA as a third monomer and then melt spun into flame-retardant PET fibers.The phosphorus content analysis of the flame-retardant PET resins by elementary analysis and NMR showed that t…
Research progress of technology and preparation methods of dinitrotoluene producing diaminotoluene were introduced,the advantages and disadvantages,and the potential applications of the various methods were also discussed.Specially,all kinds of catalysts on dinitrotoluene catalysis hydrogenation performance were analy…
The micro-mechanical characteristics of a particulate reinforced magnesium matrix composite was analyzed by FEM simulation.The results showed that such mechanical parameters as Mises equivalent stress,stress spherical tensor,deformation-energy consumption,maximum principal stress and maximum principal strain concentra…
The composite was prepared using walnut shell powder modified by titanate coupling agent,waste clay and low density polyethylene.The influence of addition of waste clay on the mechanical property and the processing flowability of the composite were investigated.The microstructures of walnut shell powder and the compos…
The study on the technology for applying domestic hard alloy cutting heads in commonly-used gun drills is introduced,which is of certain reference value for relevant enterprises and technicians.
PE base microporous foam wood fiber/plastic composite was prepared by extrusion,injection molding process.Density,bending strength,tensile strength and impact strength of the PE base microporous foam wood fiber/plastic were researched from different types of wood fiber.The experiment results showed that wood flour fil…
Hydroxyethyl cellulose(HEC)and 2-chloro-4,6-di(N,N-dimethyl-N-benzyl-1,3- propanediamine) -1,3,5-triazine(BT)were respectively used as the material and the modifier to prepare quaternary ammonium hydroxyethyl cationic cellulose ether,and the effects factors in the preparation were analyzed.The results show that in iso…
In this paper,effect of Zn content on the microstructure and properties of simulated brazing 3003 Al alloy was investigated.Transmission electron microscopy(TEM) experiments revealed that the influence of Zn alloying on the microstructure of alloy,especially the morphology of precipitate phase,was not distinct.The pre…
In this paper,plate-shape CaCO3 particles were prepared via the bubbling method with a additive.At the same time,the structure and properties of products were characterized by field emission scanning electron microscopy(FESEM),X-ray diffraction(XRD)and thermogravimetry analysis(TGA).
Two morphology of octahedron and concave tetrahexahedron Hexagonal pyramid pure Cu2O powder were prepared by hydrothermal method.The morphology and structure of product were examined by SEM and XRD technology.The possible formation mechanism of concave tetrahexahedron Hexagonal pyramid Cu2O is proposed in this paper b…
The methods of chilling return sand in V-process were summarized.the characteristics of two main cooling devices,cooling cylinder and boiling cooling bed,were introduced and the application examples of each in sand preparation line were also presented.
Under hydrothermal conditions,the effect on extraction of potassium from potash feldspar of Xinjiang Hami was studied in alkali soluble system and phosphate-phosphoric acid soluble system,respectively.The results of single factor and orthogonal experiments showed that the optimum conditions for extracting potassium in…
A new microemulsion system whose emulsifier comprised sodium dodecyl sulfonate,ethanol,n-butanol and isooctane was represented firstly.In the new system,a facile,novel ultrasonic microemulsion method was used to prepare Ag/AgCl composite nanoparticles.The morphologies and size and surface composition of the samples we…
Based on analyzed the characteristics of sand of thin-layer polymer-modified cement mortar,thin-layer polymer-modified cement mortar is prepared by iron tailings which replace fine quartz sand.The influence of dosage of EVA,HPMC,water reducing agent on mortar are studied in this paper,using scanning electron microscop…
This article briefly introduced the principle of Hydrogen corrosion.The choices of Cr-Mo steels working in the different occasions with the different technical requirements was summarized.The cause of temper brittleness was analyzed.
Nano-TiO2 which coated by coupling agent KH-570 was added into PVC through in-situ suspension polymerization for the modification of PVC.The tensile strength,impact strength and Vicat softening temperature of PVC were improved when nano-TiO2 was added.When 0.2%of nano-TiO2 was added into PVC,the tensile strength of PV…
Experiment and numerical simulation were performed by using 1 kg cylindrical aluminized explosive cased by 6 mm thick steel and aluminum shells,respectively.The results show that the steel shell can enhance the impulse,shock wave energy and decay time compared with the aluminum shell.And the influences of the steel sh…
The fluororubber and silicone rubber(FKM/MVQ) blends were filled with blended fillers of precipitated silica and high abrasion furnace black(HAF).The effect of the blended fillers on curing behavior,moony viscosity,mechanical properties,thermal ageing properties and oil resistance of FKM/MVQ blends was investigated.Th…
A series of bicomponent adhensives was prepared with epoxy acrylate and epoxy E-51 as the main materials,their gel time,water absorptivity,tensile strength,contract angle and surface energy were tested in this research,and the novel bicomponent epoxy acrylate adhesives have lower water absorptivity (1.18%~1.78%),highe…
Based on the production practice of boron micro-alloyed medium-carbon steel A36-LB,the influence of molten steel compositions,boron content in steel,oscillating curve,cooling water flow in mould,secondary cooling scheme and and rolling gap precision on the transversal corner cracks in slab are analyzed,and the corresp…