Polymeric hybrids

Pearce, E. Kwei, T. K. Lu, S. Hydrogen Bond Interactions and Self-Condensation of Silanol-Containing Polymers in Polymer Blends and Organic-Inorganic Polymeric Hybrids. In Silicones and Silicone-Modified Materials-, Clarson, S. J., Fitzgerald, J. J., Owen, M. J., Smith, S. D., Eds. ACS Symposium Series 729 American Chemical Society Washington, DC, 2000 pp 419-432. 

Polymerization hybrids are obtained by the polymerization of a linear chain initiated from the focal point of a convergent dendrimer or the chain ends of a dendrimer, or by polymerization or copolymerization of a dendronized monomer. 

Such approach of the synthesis by solid-state reaction is especially attractive with precursors that present silanol functions. Here again, the supramo-lecular association promoted by these functions combined with their reactivity allows to directly transform by a simple thermal treatment a molecular precursor to a polymeric hybrid material. Liu, et al. have reported on the possibility to polycondense silanols in the solid state [95], and Corriu et al. have obtained the formation of layered materials by condensation of bis-trisilanol precursors [96,97],... 

The complexation of 42 (R=Me) with poly(acrylic acid) (PAA) results in a mesomorphously ordered material consisting of hexagonally-ordered ion-rich cylindrical rods containing the PAA embedded in a polystyrene matrix. This complex represents a new type of a polymeric hybrid material with a supramolecular ordered nanostructure [83]. 

Because linear and dendritic polymers have very different physical properties and intermolecular interactions, copolymers of these two macromolecular architectures are expected to exhibit interesting behavior. Gitsov et al. first synthesized these polymeric hybrids by reacting one or both hydroxyl... 

Keywords Polypeptide Block copolymer N-carboxyanhydride Living polymerization Hybrid copolymer... 

Several classes of solid-state materials have particular relevance to polymeric hybrid materials as well. A very through review by Wickleder (44) describes a wide range of compounds wherein lanthanide ions are coordinated to complex anions (e.g., phosphates, sulfates, silicates, and molybdates). Typically, these materials tend to form extended stmctures through edge, face, or point sharing of the complex anion polyhedra with the Ln ion as shown in Fig. 4. This leads to... 

Some of these polymeric hybrid fluorosilicones were crosslinked to obtain fluorosiloxane elastomers that combine a good flexibility at low temperature, lower than - 40 °C, and a good thermooxidative stability over 250 °C [51,52). They may be proposed as alternative materials with respect to polyfluo-roolefin elastomers. 

Mascia, L. (1995) Developments in organic-inorganic polymeric hybrids ceramers. Trends Polym. Sci., 3, 61. 

Thomas NP, Tran N, Tran PA, Walters JL, Jarrell JD, Hayda RA, Bom CT (2013) Characterization and bioactive properties of zirconia based polymeric hybrid for orthopedic applications. J Mater Sci Mater Med 25(2) 347-354... 

Kharaziha, M., Shin, S.R., Nikkhah, M., Topkaya, S.N., Masomni, N., Annabi, N., Dokmeci, M.R., Khademhosseini, A., 2014. Tough and flexible CNT-polymeric hybrid scaffolds for engineering cardiac constructs. Biomaterials 35,7346-7354. 

Liu NJ, Wang BY, Liu WS, Bu WF (2011) Luminescent polymeric hybrids formed by platinum(II) complexes and block copolymers. Chem Commun 47 9336-9338. doi 10. 1039/clccl2192h... 

Hydrogen Bond Interactions and Self-Condensation of Silanol-Containing Polymers in Polymer Blends and Organic-Inorganic Polymeric Hybrids... 

A new convenient polymer modification has been developed to synthesize a series of novel silanol-containing polymers by a selective oxidation of Si—containing precursor polymers with a dimethyldioxirane solution in acetone. The silanol hydrogen bonding interactions in polymer blends as well as the silanol self-condensation to form siloxane semi-interpenetrating polymer networks in miscible polymer blends and organic-inorganic polymeric hybrids are discussed. 

A new convenient polymer modification for synthesis of silanol-containing polymer was developed by the selective oxidation of the Si—H bond with a dimethyldioxirane solution in acetone. The oxyfunctionalization of the silane precursor polymers can be utilized to synthesize a wide variety of silanol-containing polymers. Control over the properties of these silanol polymers, such as stability and self-association of silanols, was realized through the placement of different substitute groups bonded directly to the silicon atom. The miscibility in either polymer blends or polymeric hybrids was achieved by the formation of strong inter-polymer hydrogen bonds between the... 

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