Oxidative dehydrogenation of but-1-ene and oxidative ammonolysis of propylene on mixed oxide catalysts

Dalin, M. A.; Serebryakov, B. R.; Kolchin, I. K.; Skalkina, L. V.

doi:10.1016/0031-6458(69)90012-4

Cited by 3 publications

(4 citation statements)

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“…In this family of hardeners under investigation, three derivatives such as mono‐, di‐, and tricyanoethylated TETA were synthesized in the laboratory by reacting TETA with 1, 2, and 3 moles of AN respectively using the Michael condensation reaction5, 6 following the typical reaction scheme shown in eq. (1).…”

Section: Methodsmentioning

confidence: 99%

“…It therefore would be of interest to examine the electrical conductivity properties of different epoxy matrices resulting from curing using different amine hardeners to effect varying crosslink densities through incorporation of different levels of cyanoethyl moiety into the matrix resin. In this article, the conductivity properties of such epoxy matrices due to a family of cyanoethylated triethylenetetramine5, 6 hardeners is reported.…”

Section: Introductionmentioning

confidence: 99%

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Treatment of advanced colorectal carcinoma with oxaliplatin and capecitabine

Shields

Zalupski

Marshall

et al. 2004

Cancer

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A depth filtration model has been developed, based on the three‐dimensional void network model Pore‐Cor. The geometry of the void network is fitted, by means of an eight‐dimensional Boltzmann annealed amoeboid simplex, to the porosity and percolation characteristics of stainless steel sintered filters measured by mercury porosimetry. Preferential and critical flow paths through the network are calculated. Particles from an experimental size distribution are fed along these flow‐biased paths, and when straining occurs, the flow paths are re‐calculated. We show that the model usefully reproduces experimental filtration efficiencies as a function of pressure drop, measured by single pass tests. We also offer a critique of current measurements of filtration efficiency, suggesting the use of a new “alpha efficiency” rather than the standard beta efficiency. The model is currently being adapted to accept porometry as well as porosimetry data, hence avoiding the use of mercury. © 2009 American Institute of Chemical Engineers AIChE J, 2009

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Treatment of advanced colorectal carcinoma with oxaliplatin and capecitabine

Shields

Zalupski

Marshall

et al. 2004

Cancer

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“…The polymeric radicals grow a critical length and then precipitate out of solution. 24 The propagation involves the interaction of small molecules (monomer) with large molecules (macroradicals), whereas segmental movement is limited for two macroradicals combining for termination to occur. Thus, the value of k p should not be affected as much as k t .…”

Section: B Periodic Initiation (Bimolecular Termination)mentioning

confidence: 99%

Polymerization Coupled To Oscillating Reactions: (1) A Mechanistic Investigation of Acrylonitrile Polymerization in the Belousov−Zhabotinsky Reaction in a Batch Reactor

et al. 1999

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When acrylonitrile is added to the Belousov−Zhabotinsky reaction, periodic polymerization is observed. (Pojman, J. A.; Leard, D. C.; West, W. W. J. Am. Chem. Soc. 1992, 114, 8298). The polymer's structure and the amount of bromine in the polymer sample were determined by 13C NMR and elemental analysis, respectively. Carbon-13-labeled malonic acid indicates that polymerization of acrylonitrile is initiated by malonyl radical. The bromous radicals are believed to terminate the polymer leaving an alcohol group on the polymer end. Further analysis of the polymer sample confirms that the sample is partially brominated. Numerical simulations based on a modified FKN mechanism are found to be in good agreement with experimental findings. Simulations indicate that periodic termination of the polymer chain by bromine dioxide, not the periodic initiation by malonyl radical, is the dominant cause of the periodic polymerization. Similar results were found in the malonyl-controlled variant of the BZ reaction.

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“…Saum [50] showed that there exist strong intermolecular forces in polyacrylonitrile and arise principally from dipole -dipole interactions between ZCN groups on adjacent chains. Another study showed that the high polarity of nitrile groups in the polymer causes the formation of numerous intermolecular hydrogen bonds between the chains [51].…”

Section: Styrene -Acrylonitrile Copolymermentioning

confidence: 99%

Graph theoretical approach to the mechanical strength of polymers

Gündüz¹,

Dernaika²,

Dikencik³

et al. 2008

Molecular Simulation

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In this research work, a graph theoretical approach has been introduced to find a mathematical model for the change of hardness of weakly cross-linked polymer network systems with the change of configurations. The polymers studied are (i) poly(methyl methacrylate), (ii) styrene -acrylonitrile copolymer and (iii) polystyrene. In very weakly cross-linked polymer network systems, both the chain entanglement and the network rigidity competitively contribute to the hardness of polymer network. The average length (i.e. molecular weight), and length distribution of chains between the cross-linking sites both play important roles in network rigidity. The former can be changed by the mole fraction of the cross-linker, and the latter by the molecular weight of the prepolymer formed, which can be controlled by the late addition of the cross-linker. Graph theoretical approach introduces simplifications to the dynamics of polymer chains and polymer network, and thus can explain the change of hardness with the change of chain statistics. It was shown that there was a very good agreement between the theoretical equations and the experimental hardness values of polymer network systems studied. It was also found that there were scaling relations between the parameters used in the theoretical equation.

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Oxidative dehydrogenation of but-1-ene and oxidative ammonolysis of propylene on mixed oxide catalysts

Cited by 3 publications

References 0 publications

Treatment of advanced colorectal carcinoma with oxaliplatin and capecitabine

Treatment of advanced colorectal carcinoma with oxaliplatin and capecitabine

Polymerization Coupled To Oscillating Reactions: (1) A Mechanistic Investigation of Acrylonitrile Polymerization in the Belousov−Zhabotinsky Reaction in a Batch Reactor

Graph theoretical approach to the mechanical strength of polymers

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