Materials Literature
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Adding inorganic salt anhydrous calcium chloride to the emulsion systems,with 1-octadecene as the monomer,pentaerythritol tetraacrylate as cross-linking agent,2,2′-azobisisobutyronitrile as initiator,Span80 as emulsifier,cyclohexane as porogen,respectively,high oil-absorbing resins were synthesized by high internal ph…
Dynamic H2S removal equipment of oilfield oil-gas-water three-phase mixed gathering and transportation system is simulated indoor and used to evaluate the optimal applied conditions of efficient H2S scavengers ETTS-1 and alcamine solvents(MDEA-MEA and MDEA).The effects of initial concentration of H2S,temperature of de…
Gassolid reaction between alkali cellulose and propylene oxide was used to synthesize low degree of substitution hydroxypropyl cellulose (HPC). The influences of propylene oxide mass fraction, temperature as well as squeeze ratio exerted on both the etherification degree and propylene oxide effective utilization rate…
A facile aqueous electrochemical deposition approach was developed for the deposition of cuprous oxid.The morphology and structure of the as-prepared products were characterized by the techniques of powder X-ray diffraction(XRD) and scanning electron microscopy(SEM).The influencing factors such as deposition potential…
A bismaleimide composite material was subject to long-term( 1000 h) thermal aging at 150 ℃ under oxidative condition. The changes of physical properties and chemical structure of the composite were analyzed by means of different techniques,including gravimetric analyzer( TGA),dynamic mechanical analysis( DMA),X-ray ph…
The construction scheme of a polymer chemical comprehensive experiment with the theme of synthesis of ABS grafted powder was proposed,which was planned for undergraduates teaching.The aim of the teaching,the experimental steps,experimental principle and the innovation points,and the expected teaching effects of this e…
Environmental scanning electron microscope was used to research on the self assembly of the SMP-2 and SMC in aqueous solution,and the absorption of clay particles in the solution before and after aging in 220 ℃ for 16 h.According to the cross-linking mechanism,found a temperature protective agent and measured fluid pe…
In order to improve mobility and specific volume of ceftriaxone sodium,the crystallization process of ceftriaxone sodium was optimized.Firstly,ceftriaxone sodium crude was dissolved in water for injection,a contain amount of acetone was added and the water temperature was controled at 10～15 ℃,appropriate amount of act…
Soluble carboxymethyl silk fibroin was prepared from the waste silk by etherification of the water-fast silk fibroin and the monochloracetic acid in ethanol. Various factors on etherified degree of products(such as alkalized time, alkalized temperature, etherified time and etherified temperature, etc.) were discussed.…
The cassava starch and acrylamidee as raw materials and ammonium persulfate-sodium bisulfate(NH4)2S2O8-NaHSO3 as the initiator system were introduced,the scale inhibitng properties of SGA copolymer under different experiment water condition on the calcium phosphate were studied.The effects of temperature,times and con…
ZnO microrods were synthesized by employing Zn(Ac)2·2H2O,KI and N2H4·H2O as the starting materials without using any surfactant.The products were characterized by X-ray diffraction (XRD),scanning electron microscope (SEM).The results show that the as-synthesized ZnO are mainly consisted of hexagonal microrods with 1μm…
Using a zero-dimension Monte-Carlo method based on point kinetics,b urst initiation time for GodivaⅠ assembly in the presence of weak neutron source,w hose reactivity was 5c/above prompt criticality, was calculated.The initiation time of the simulation is consistent with the results of Monte-Carlo simulation and exper…
Dynamic surface tension behavior of fluorinated hyperbranched copolymers polyglycidyl ether-b-polyhexafluorobutyl acrylate(PG-b-PHFBA) with various different structures in ionic liquid() were studied.The diffusion coefficients were calculated via Ward and Tordai's equation,and the effect of molecular structure on diff…
Chloromethyl dimethylchlorosilane was synthesized by the reaction of chloromethyl ethoxy dimethylsilane with ethanol and the reaction conditions were optimized.The target product was obtained in 92% yield(purity 98%) while the reaction was conducted in petroleum ether at 65℃ using urea as the acid-binding agent.
The current research situation of thermal shock resistance of NiFe2O4 inert anode material for aluminium electrolysis is summarized in this paper.The theory of the material's thermal shock fracture is briefly introduced,and the relative research situation of thermal shock resistance of NiFe2O4 base cermet is reviewed,…
In order to improve the mechanical properties of stainless steel and promote its application as a structural material,we developed a high strength stainless steel with low alloy content in the laboratory by controlling the alloy element content and using appropriate processing technologies.This paper introduced the va…
Norbornene anhydride end-capped PMR polyimide has excellent processing properties,thermal stability and mechanical properties,which is widely used in aerospace and other high-temperature areas.It was reviewed that research progress in the crosslinking structure and thermal decomposition of norbornene anhydride end-cap…
Discussing the FCC regenerator flue gas emissions of nitrogen oxides major research progress.Structural design of the regenerator,the regenerator flue gas treatment processes and downstream NO x reduction additive is currently the main research direction,it recommends that future attention on the increasing in FCC the…
Homemade templates of different micro scale were used to prepare super-hydrophobic PVDF,and the effects of different micro-nano rough structure on super-hydrophobicity were analyzed.Low-surface-energy polymers were applied on the film through surface smearing and blend doping,and the relation between surface free ener…
The crystallization behavior of PLA with different gel content was studied.The crystallization of PLA was decreased with increasing the gel content.When stretched at 65 ℃,the cross-linked network of PLA could hardly move,and the PLA sample without cross-linking had high orientation and crystallization capacity under d…