Materials Literature
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The reactivity,reaction mechanism and curing process of E-51 epoxy resin modified bisphenol A cyanate ester resins(BADCy) were studied by DSC and FTIR.The thermal properties of E-51 modified BADCy cured products were investigated by TGA.The water absorption and mechanical properties of cured products were also tested.…
The polymer crystallization theory was introduced.The crystallization rate of polyester can be accelerated by adding nucleating agents to the polyester system.The research progress of using the nucleating agents to improve the crystallization rate of polyester at home and aboard were reviewed.It's also given the suita…
The effect of vanadium on the DIFT (Deformation Induced Ferrite Transformation) microstructure coarsening in low carbon steel during the continuous cooling processes and isothermal processes at different temperatures were investigated using thermo-simulator.The results showed that the steel containing a small amount o…
In an isopropanol(iPA)-H2O heterogenous system,boron was used as a promoter and 3-chloro-2-hydroxypropyl trimethyl ammonium chloride(CTA)was used as an etherifying agent to achieve the cationic reaction of cellulose(Cel.).By orthogonal experiments,the factors for degree of substitution(DS)were optimized,and product st…
With Al-SiO2-sucrose as reactive system,Al2O3-Si hollow ceramic microspheres were synthesized using SHS flame quenched technology.Reaction mechanism of hollow ceramic microspheres was studied.The results show that sphere,similar sphere and irregular powders constitute the spraying products.The sphere and similar spher…
The insulator's pollution flashover performances under DC voltages are relied on porcelain and glass insulators with different suspension modes such as single link suspension(Ⅰ-shape),double link suspension(Ⅱ-shape),and Ⅴ-shape.The pollution flashover performances of insulators with horizontal tension arrangement are…
Activated carbons for electrochemical double-layer capacitor electrodes were prepared from peasecod-based carbons using ZnCl_2 or KOH as activating agents.The pore structures of the prepared activated carbon materials were characterized using N_2 adsorption.The specific surface area of the peasecod-based carbon materi…
Two novel energetic coordination compounds using 1,5-diaminotetrazole as ligand,Co or Cu as the central cation and picric acid as outer ion were synthesized and characterized by elemental analysis,FT-IR spectroscopy.The effects of the two complexes on thermal decomposition of AP,HMX and HNIW were investigated by DSC a…
A kind of environmentally acceptable water-based anti-rust agent containing silicate as the major component was prepared by complexing with various anti-rust auxiliaries.The performance of resultant rust inhibitor was evaluated based on observation of appearance,immersion test in NaCl solution,humid test,measurement o…
Calcium aluminate glass is a good candidate of infrared material.However,the residual OH-in calcium aluminate glass and the poor glass-forming ability of calcium aluminate glass restrict its application.The infrared property and crystallization kinetics of calcium aluminate glass were studied.The results showed that t…
In this work,the enzymatic hydrolysis of squid ink was investigated to prepare natural melanin.Squid ink was hydrolyzed by papain,neutral protease,acidic protease,pepsin and tyrpsin,respectively,and pepsin was found to have the strongest ability to hydrolyze squid ink.Based on one-factor-at-a-time experiments,an L9(34…
The dissimilar steel of pearlitic steel(Q235)and austenite steel(1Cr17Mn6Ni5N) was welded by plasma arc welding.The microstructure of welded joint was observed by optical microscopy and scanning electron microscopy,the microhardness of welded joints was measured.The results indicate that the plank martensite hardening…
The research development on natural rubber(NR) nano-composite materials prepared by natural rubber with nano-SiO2,nano-organophilic montmorillonite,nano-CaCO3,nano-ZnO and carbon nano-tubes was reviewed.Adding nano-filler to NR improved properties and had new characteristics of nano-composite materials.
A novel method was developed for the synthesis of thioglycolic acid-capped CdTe quantum dots(QDs)in aqueous medium when tellurium dioxide worked as tellurium source and sodium borohydride acted as reductant.The influence of experimental conditions,including refluxing time,pH value,molar ratio of tellurium to cadmium a…
Some kinds of phosphors were synthesized with Eu/Dy coating ZnO nanocrystals by co-precipitation approach derived from Zn(AC)2·2H2O,NaOH as precursors.The crystal structure and size were characterized by the X-ray diffraction.Photoluminescence(PL) measurements show an intense red luminescence at 612 nm caused by trans…
This paper described the importance of rare earth permanent magnet and introduced its applications and production equipment and technology.
Aimed at normal and oblique penetration into semi-infinite concrete/limestone targets by a high-speed projectile,an axis drag force was employed to reflect the continuous variation of the nose shape.With considering the transverse load in the cases of asymmetrical mass abrasion and oblique penetration,a method was pro…
Flame retardancy of new phosphorus-nitrogen flame retardant(OP)based on aluminum dialkylphosphinate for nylon 6 was studied.The results showed that the flame retardant had good flame retardancy for nylon 6.When the loading of OP was 25 wt%,the LOI of the nylon 6/OP composite was more than 30 and the flame retarding cl…
This article gave the considerations of the TEOM RP1400a PM10 based on the operation principles,analyzed the conditions of negative value apperance,abnormal flow-rate,obvious non-continuous undulation on the monitor,abnormal display,etc.and proposed the corresponding solutions.
【Objective】 To investigate the effects of acute hypoxia on the electrophysiological properties of VSMCs in guinea-pig spiral modiolar artery.【Methods】 Whole-cell patch clamp recordings were performed to study the effects of acute hypoxia on the whole-cell membrane current,resting membrane potential(RP),membrane input…