A lattice model for the simulation of diffusion in heterogeneous polymer systems. Simulation of apparent diffusion constants as determined by pulse-field-gradient nuclear magnetic resonance
Article Abstract:
A lattice model is presented based on an approach developed by Ediger to characterize diffusion as a function of time in heterogeneous media and at all compositions. The model demonstrates that apparent diffusion data from pulse-field-gradient nuclear magnetic resonance (PFG NMR) provide a new structural view of the heterogenetics in the system with more- and less- permeable domains.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2003
User Contributions:
Comment about this article or add new information about this topic:
Incorporation of fused tetrathiafulvalenes (TTFs) into polythiophene architectures: Varying the electroactive dominance of the TTF species in hybrid systems
Article Abstract:
A new polythienylenevinylene (PTV) and two polythiophenes (PTs), having fused tetrathiafulvalene (TTF) units were prepared and characterized by ultraviolet-visible (UV-vis) and electron paramagnetic resonance (EPR) spectroelectrochemistry. Polymers 2 and 4 having the highest concentration of TTFs display redox behavior dictated by fulvalene system.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
Synthesis and photophysical characteristics of 2,7-fluorenevinylene-based trimers and their electroluminescence
Article Abstract:
Three new 2,7-fluorenevinylene-based trimers are synthesized and characterized. The synthesis is conducted by the Heck coupling reaction of 9,9-dihexyl-2,7-divinylfluorene with 2-(4-bromophenyl)-5-phenyl-1,3,4-oxadiazole, N,N-diphenyl-4-bromoaniline, or 3-bromopyrene to afford the trimers OXD, TPA, and PYR, respectively.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Surface modification of halogenated polymers.7. Local reduction of poly (tetrafluoroethylene) and poly (chlorotrifluoroethylene) by a scanning electrochemical microscope in the feedback mode
- Abstracts: Quantitative determination of the speciation of surface vanadium oxides and their catalytic activity. Comparative study of bulk and supported V- Mo- Te- Nb- O mixed metal oxide catalysts for oxidative dehydrogenation of propane to propylene
- Abstracts: Vibrational spectroscopy of aqueous sodium halide solutions and air-liquid interfaces: observation of increased interfacial depth
- Abstracts: Effect of molecular binding to a semiconductor on metal/molecule/semiconductor junction behavior. In Situ IR study of transient CO2 reforming of CH4 over Rh/Al2O3