Materials Literature
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Epoxy grafted acrylate composite latex is prepared by using two-step synthesis method.The process not only solves the problem of organic solvents pollution,but also increases the graft ratio and improves simultaneously the storage stability.The optimum conditions of the reactive process are determined.The chemical str…
The edge cracked flattened ring(ECFR)specimens of sandstone were diametrically impacted bylarge-diameter split Hopkinson pressure bar(SHPB)in the model-I rock dynamic fracture test. Crack prop-agation gauge(CPG)is used to measure the crack initiation time and crack propagation velocity,the CPGis more sensitive than tr…
The nano-Mn-Zn ferrite particles were prepared under a near-neutral condition for the purpose of improvement on their magnetic properties by using a mixture of NH3· H2O and NH4HCO3as precipitants. The results show that an apparent decrease in sedimentation time( 15 min,about 1 /3 of the NaOH) was observed for the nano…
Objective To investigate the main component of the domestic aramid fiber( DAF-III) sizing agents and its effect on the interfacial properties of composites. Methods The fibers were extracted by acetone for a certain period of time. The extracts and fibers before and after extraction were characterized. The DAF-III rei…
Comparative analysis on characteristics of acid soluble collagen(ASC) extracted from grass carp fish scale, skin and bone was conducted. The ultraviolet spectrum and electrophoresis showed that ultraviolet characteristics absorption peak positions of three kinds of ASC were consistent with type I collagen, and the mol…
Vimentin is a major intermediate filament protein of mesenchymal cells. Abundant studies in experimental models have shown that vimentin play a crucial role in the occurrence,development,invasion and metastasis of cancer. Vimentin could regulate the interaction between cytoskeletal proteins with cell adhesion molecule…
In order to study the formation mechanism of fouling with the action of Fe2O3corrosion product,the absorption system of Fe and Fe2O3on calcite(1-10)crystal face was simulated and treated to be balanced in terms of molecular dynamics method.The adhesion energy of two absorption systems was deduced and compared by calcu…
The processes of thermal decomposition and kinetics analysis of F-12 fiber and aramid fiberⅢ were studied and compared by thermo-gravimetric(TG)and differential thermo-gravimetric(DTG)analysis.The thermal behaviors and kinetic parameters of F-12 fiber and aramid fiberⅢ at different heating rates(5,10,15,20 ℃/min)were…
Sweet potato starch was enzymed by medium-temperature α-amylase in order to reduce the starch content.Optimized hydrolysis conditions by response surface methodology,and the obtained optimum hydrolysis conditions were used in potato pressure puffing process,aimed to obtain a better sweet potato pressure puffing proces…
Objective: To optimize extraction and membrane separation technology of active polypeptides in Trionycis Carapax. Method: With extract yield and extraction amount of total polypeptides as evaluation indexes,orthogonal test was employed to optimize extraction process of polypeptides in Trionycis Carapax by taking solid…
The shape memory mechanism of polymer materials was introduced,and the classification,characteristic and the development of the shape memory polymer were outlined with 27 references.The application and development prospect of shape memory polymer materials were forcasted.
The average unit consumption of imported and home cyclohexyl methyl dimethoxy silane(CHMMS) external electron donors was investigated in Novolen gas-phase polyproplene(PP) plant and the effects of the CHMMS external electron donors on catalyst activity,PP isotacticity and PP properties were studied by continuous plant…
With the decrease of resource of petroleum on earth and the increase of carbon emission which attributed to severe environmental pollution,it was of far-reaching significance and prosperous market potential to take the place of petroleum with corn straw in producing ethylene glycol to synthesis of polydihydricals alco…
The effects of hygrothermal aging on the PBO fiber / epoxy resin unidirectional composites were investigated through studying the bending properties,the surface physical and chemical state of PBO fiber,the water absorption ratio,and the interfacial shear strength of PBO fiber and composites. The results show that the…
The hybrid powder compacts of Mg,Y2O3 and SiC were fabricated by powder mixed and compressed method, then magnesium matrix composite can be obtained with the power released by heat conduction of basic plates and self-propagating of upper hybrid powder mixed compacts under the function of argon arc heat sources. Finall…
PP/ABS alloy was synthesized by melt blending in a mixer,with dicumyl peroxide(DCP)as cross-linking agent and triallyl isocyanurate(TAIC)as assistant crosslinker.The prepared product was characterized by infrared spectroscopy and scanning electron microscopy.The results showed that the optimal addition amount of DCP w…
The contact radius of thin plates subjected to impacts with great deflection may be larger than that which is directly calculated with the Hertzian contact law.Two methods are proposed to calculate the contact radius with consideration of the deflection of a thin plate.The preliminary contact radius is calculated firs…
By using a high temperature split Hopkinson pressure bar apparatus composed of a traditional Φ100 mm SHPB and a high-temperature device,a dynamic compression test of granite chosen from Shaanxi Qinling mountain under high temperature and dynamic loading was conducted. The varying laws of its peak stress,peak strain an…
A two-dimensional elastic plastic hydrodynamics Eulerian code MEPH is applied to simulate micro-jet formation and penetration process of void in sample during shock loading. We focused on forming process of micro-jet. Maximal penetration depth versus key factors such as shock pressure and void diameter is analysed. Th…
As an typical narrow bandgap semiconductor,cuprous oxide has received much attention from domestic and international researchinstitutes. This paper summarizes the progess in photocatalysts using cuprous oxide in recent years,including the main preparation method and photocatalytic properties of Cu2O,which are divided…