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  • Articles: DFG German National Licenses  (4)
  • chemical potential  (2)
  • ethylene glycol dimethacrylate resin  (2)
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  • Articles: DFG German National Licenses  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Chemical potential prediction in realistic fluid models with scaled particle theory (1990)
    Springer
    International journal of thermophysics 11 (1990), S. 73-86 
    Details
    ISSN: 1572-9567
    Keywords: chemical potential ; Kirkwood charging process ; Lennard-Jones fluid ; scaled particle theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A procedure frequently proposed in the literature for calculating chemical potentials relies on the Kirkwood charging process. Numerical problems associated with coupling large repulsive forces can be avoided by estimating the contribution to the chemical potential due to these forces with scaled particle theory. The contribution due to soft repulsive forces and attractive forces can be calculated with the Kirkwood charging process using distribution functions for a test particle obtained from integral equation theories. We have used the accurate HMSA theory of Zerah and Hansen to provide distribution functions in mixtures of Lennard-Jones molecules, and we have used the PYP theory of Lee to scale the distribution functions over the charging process. The theory provides accurate estimates of chemical potentials over a range of densities from gas-like to liquid-like when the reduced temperature kT/ɛ is greater than 2. Accurate results for excess free energy changes of mixing are also obtained at these conditions. At lower temperatures accurate results are obtained for low to moderate reduced densities (ρσ 3⩽0.5).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503860
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Consistency conditions for the integral equations of liquid structures (1996)
    Springer
    International journal of thermophysics 17 (1996), S. 663-672 
    Details
    ISSN: 1572-9567
    Keywords: bridge function ; chemical potential ; closure relation ; GibbsDuhem relation ; integral equations ; Lennard Jones potential ; pressure consistency ; thermodynamic consistency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A thermodynamic consistency principle is established for the closure relations in integral equations that can yield accurate correlation functions as well as accurate thermodynamic properties, A brief lour d'horizon is given for existing consistency approaches. In addition to the common pressure consistency and the pressure energy consistency, we introduce a third requirement based on the Gibbs-Duhem relation. We found that Gibbs Duhem relation, mediated through the chemical potential, is instrumental in procuring accurate behavior of the bridge function and cavity Junction in the overlapping region (0 〈r 〈 σ). We test the Lennard Jones fluid over wide ranges ofT * andp * (T * as low as 0.72 andp * up to 11,90(, For more than IS state points we obtain excellent agreement in internal energy, pressure, and chemical potential. Comparison with Monte Carlo data on the bridge Junction and the radial distribution function also shows that the present approach is highly accurate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01441512
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Microgel formation in the free radical crosslinking polymerization of ethylene glycol dimethacrylate (EGDMA). I. Experimental (1995)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 33 (1995), S. 257-267 
    Details
    ISSN: 0887-624X
    Keywords: ethylene glycol dimethacrylate resin ; microgel ; bimodal polymers ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An important feature of free radical crosslinking polymerization of ethylene glycol dimethacrylate (EGDMA) resin is the formation of heterogeneous structure through intramolecular reaction. Such structure formation affects not only the cure behavior and rheological changes of the resin but also the physical properties of the formed polymers. In this study, the reaction kinetics, morphological changes, and characteristics of formed polymers were examined by a differential scanning calorimeter, a Rheometrics Dynamic Analyzer, a dynamic light scattering goniometer, and a Fourier transfer infrared spectrometer. Experimental data showed the formation of bimodal polymers before gelation. These polymers are partially crosslinked and can be considered as microgel particles. © 1995 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1995.080330208
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Microgel formation in the free radical crosslinking polymerization of ethylene glycol dimethacrylate (EGDMA). II. Simulation (1995)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 33 (1995), S. 269-283 
    Details
    ISSN: 0887-624X
    Keywords: ethylene glycol dimethacrylate resin ; translational diffusion ; segmental diffusion ; microgel ; percolation model ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The simulation of free radical crosslinking polymerizations of multifunctional monomer by a percolation model was performed on a two-dimensional lattice with periodical boundaries. The model was formulated in such a way that a variety of monomers, translational diffusion of monomer and polymer molecules, segmental diffusion of polymer, shielding effects, microgel formation, and unequal reactivities of vinylene bonds can be considered. Simulation results of the 2-D model agreed well with those of a 3-D model. The percolation model was able to qualitatively verify several experimental results. © 1995 John Wiley & Sons, Inc.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1995.080330209
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    Paper (German National Licenses)
    Fulltext
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