Derived networks

It has also been found that polymers possessing functional groups such as amines and pyridines are soluble in pregeUed sol solutions, especially, poly(2-vin5ipyridine) and poly(N-vinylpyrroHdinone) (PVP) (49). There, materials were made as part of a study of the synthesis of nonshrinking sol—gel-derived networks (49). 

Void-free phenolic-epoxy networks prepared from an excess of phenolic novolac resins and various diepoxides have been investigated by Tyberg et al. (Fig. 7.37).93 -95 The novolacs and diepoxides were cured at approximately 200°C in the presence of triphenylphosphine and other phosphine derivatives. Network densities were controlled by stoichiometric offsets between phenol and... 

Douglas SM, Montelione GT, Gerstein M. PubNet a flexible system for visualizing literature derived networks. Genome Biol 2005 6 R80. 

The fast stage of relaxation of a complex reaction network could be described as mass transfer from nodes to correspondent attractors of auxiliary dynamical system and mass distribution in the attractors. After that, a slower process of mass redistribution between attractors should play a more important role. To study the next stage of relaxation, we should glue cycles of the first auxiliary system (each cycle transforms into a point), define constants of the first derivative network on this new set of nodes, construct for this new network an (first) auxiliary discrete dynamical system, etc. The process terminates when we get a discrete dynamical system with one attractor. Then the inverse process of cycle restoration and cutting starts. As a result, we create an explicit description of the relaxation process in the reaction network, find estimates of eigenvalues and eigenvectors for the kinetic equation, and provide full analysis of steady states for systems with well-separated constants. 

In good agreement with these findings, EL incorporation in oCG-DMAC derived networks before cross-linking resulted in a slight increase of Tm [56], but Tm decreased for higher payloads (unpublished data). Also, a continuous decrease in the melting enthalpy was observed when more EL was incorporated, which confirms alterations in crystallite formations. However, from these data no conclusions on the size, size distribution, and overall percentile content of crystals should be... 

Fig. 11 Illustration of the principle of an SMP ureteral stent from oCG-DMAC derived network. Figure from [43]. Copyright Wiley-VCH Verlag GmbH Co. KGaA. Reproduced with...

Bimetallic complexes with planar four-coordinate ions in the primary diamido-iV-dialkoxido sites are capable of achieving planarity across the primary metal, the ligand donor atoms, and the central aromatic ring. This planarity is useful for reducing the complexity of derivative network solids. 

Thermal stability in nitrogen exceeded 400°C in most network cases which is characteristic of both siloxane and PFCB containing materials. Not shown here is the thermal oxidative stability for thermosets 11 -14 . In contrast to the TFVE reactive polymers prepared from mono-olefin TFVE derivatives, networks 11 -14 prepared from TFVE functionalized di-olefin monomers do not contain oxidatively unstable benzylic carbons. 

Neouze M-A, Bideau JL, Gaveau P, Bellayer S, Vioux A (2006) Ionogels, new materials arising from the confinement of ionic liquids within silica-derived networks. Chem Mater 18 (17) 3931-3936... 

Lunstroot K, Driesen K, Nockemann P et al (2006) Luminescent Ionogels based on europium-doped ionic liquids confined within silica-derived networks. Chem Mater 18 5711-5715... 

In 1998 Velazquez-Morales et described the synthesis of oxipro-pylated chitosan grafted and crosslinked with oligoether-based mono- and diisocyanates, as in the case of cellulosic ethers. The ionic conducting membranes were obtained by introducing lithium bis(trifluoromethyl sulfonyl) imide (LiN(Cp3S02)2 - LiTFSI) by diffusion from an acetonitrile solution, yielding values similar to those obtained for the cellulose derivative networks described above. 

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