Polymer core-shell

Yi, GS. and Chow, GM. (2007) Water-soluble NaYF4 Yb,Er(Tm)/NaYF4/polymer core/shell/shell nanoparticles with significant enhancement of upconversion fluorescence. Chemistry of Materials, 19, 341-343. 

Chao, D., Xia, X., Liu, J., Fan, Z., Ng, C.F., Lin, J., Zhang, H., Shen, ZX, Fan, H.J., 2014. A V205/Conductive-polymer core/shell nanobelt array on three-dimensional graphite foam a high-rate, ultrastable, and freestanding cathode for lithium-ion batteries. Adv. Mater. 26,5794-5800. 

Xia, C., Chen, W., Wang, X., Hedhili, M.N., Wei, N., Alshareef, H.N., 2015. Highly stable supercapacitors with conducting polymer core-shell electrodes for energy storage applications. Adv. Energy Mater. 5, 1401805. 

Zhang, J. Misra, R.D.K. 2007, Magnetic drug-targeting carrier encapsulated with thermosensitive smart polymer Core-shell nanoparticle carrier and drug release response , Acta Biomaterialia, vol. 3, no. 6, pp. 838-850. 

J.Y. Hong, J.S. Jang, A comparative study on electrorheological properties of various silica-conducting polymer core-shell nanospheres, Soft Matter, 2010, 6, 4669. 

Z. Cui, B. Yang, Monodisperse silica-polymer core-shell microspheres via surface grafting and emulsion polymerization. Macromol. Mater. Eng. 2003, 288, 380-385. 

Jang J, Lim B. Facile fabrication of inorganic-polymer core-shell nanostructures by a one-step vapor deposition polymerization. Angew Chem Int Ed 2003 42 5600-3. 

Barahona, R, Turiel, E., Cormack, P A. G., Martin-Esteban, A., Chromatographic Performance of Molecularly Imprinted Polymers Core-Shell Microspheres by Precipitation Polymerization and Grafted MIP Films via Iniferter-Modified Silica Beads, 1. Polvm. Sci. A Polvm. Chem. 2010,48,1058-1066. 

Co-electrospinning has been applied so far for the preparation of polymer core shell fibers, hollow polymer core shell fibers, hollow fibers composed not only of polymers, but also of ceramics, as well as for the immobilization of functional objects in droplets dispersed in the core that are arranged along the fiber axis. Among the examples reported in the literature are core shell fibers spun from polystyrene and polyethylene oxide, two kinds of polyethylene oxide (one with and the other without a chromophore), and core shell fibers with the electrically conductive polymer polyhexathiophene and the insulation polymer polyethylene oxide (Fig. 20). Hollow core shell fibers in which one polymer (polycaprolactone) forms the shell onto which the core material is deposited (polyethylene oxide) as inner wall is another example for the broad spectrum of fiber architectures which can be produced by coelectrospinning. The formation of the two-layer hollow fiber is based on the... 

When monomers of drastically different solubiUty (39) or hydrophobicity are used or when staged polymerizations (40,41) are carried out, core—shell morphologies are possible. A wide variety of core—shell latices have found appHcation ia paints, impact modifiers, and as carriers for biomolecules. In staged polymerizations, spherical core—shell particles are made when polymer made from the first monomer is more hydrophobic than polymer made from the second monomer (42). When the first polymer made is less hydrophobic then the second, complex morphologies are possible including voids and half-moons (43), although spherical particles stiU occur (44). 

A unique feature of in situ encapsulation technology is that polymerization occurs ia the aqueous phase thereby produciag a condensation product that deposits on the surface of the dispersed core material where polymerization continues. This ultimately produces a water-iasoluble, highly cross-linked polymer capsule shell. The polymerization chemistry occurs entirely on the aqueous phase side of the iaterface, so reactive agents do not have to be dissolved ia the core material. The process has been commercialized and produces a range of commercial capsules. 

These are all examples of soluble polymers. Combinations of soluble with insoluble polymers have also been reported. Polychloroprene or chlorosulfonated polyethylene was eombined with core-shell polymer particles to give an adhesive with improved cold impact resistance [33]. The fascinating chemistry of chlorosulfonated polyethylene in acrylic adhesives will be further discussed in the section on initiators. In many cases chlorosulfonated polyethylene is chemically attached to the acrylic matrix. 

Self-Organization of Core-Shell Type Polymer Microspheres and Applications to Polymer Alloys... 

These core-shell type microspheres have very interesting structural features in that the cores are hardly crosslinked and the shell chains are fixed on the core surface with one end of the shell chains. The other end of the shell chains is free in good solvents for the shell chains. As the result of such a specific structure, the solubilities of the core-shell type polymer microspheres are governed by, not the core, but by the shell sequences, and the core-shell structures do not break even in the dilute solution [9,10]. 

Generally, the number of the shell chains in a microsphere ranges from a few hundred to a few thousand. The range of the diameter of the core is from 10-100 nm. Such a core-shell structure is very similar to the (AB)n type star block copolymers, which have many arms and spherical polymer micelles of the block or graft copolymers formed in selective solvents that are good for the corona sequence and bad for the core sequence. In fact, many theoretical investigations of the chain con-... 

The feature of the core-shell type polymer microspheres that differentiates them the most from the (AB)n type star block copolymers is size. The external diameters of the core-shell type polymer microspheres are generally from about 20-200 nm in the good solvents instead... 

The core-shell type polymer microspheres were synthesized upon the chemical crosslinking of the spherical microdomains in the microphase separated films. The block copolymers were dissolved in 1,1,2-trichloroeth-... 

In three dimensions, Ohta and Kurokawa [32] reported that a BCC arrangement was only slightly more favored than the FCC arrangement. In fact, many BCC structures have been reported for AB type block copolymers and the blends of homopolymer-block copolymer systems [27,33-35]. However, the lattice structure of the core-shell type polymer microspheres was FCC. This FCC formation resulted in the lower viscosity of... 

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