Cores crosslinking

Figure 6.3 The chemical compositions for macromolecular objects that result from crosslinking within nanodomains of bulk phase separated block copolymers include (a) core-crosslinked spheres (b) core-crosslinked rods (c) mushroom -shaped objects.

Figure 6.4 The preparation of nanostructured materials in solution evolves from (a) the classic examples of suspension, dispersion, or emulsion polymerization, to the methods that include the covalent crosslinking of select domains within supramolecular polymer assemblies (b) core crosslinking of polymer micelles (c) shell crosslinking of polymer micelles (SCKs) (d) nanocages from core-eroded SCKs (e) shaved hollow nanospheres from outer shell/core-eroded vesicles.

Figure 6.5 Illustrations of nanoscale spherical assemblies resulting from block copolymer phase separation in solution are shown, along with the chemical compositions that have been employed to generate each of the nanostructures (a) core crosslinked polymer micelles (b) shell crosslinked polymer micelles (SCKs) with glassy cores (c) SCKs with fluid cores (d) SCKs with crystalline cores (e) nanocages, produced from removal of the core of SCKs (f) SCKs with the crosslinked shell shielded from solution by an additional layer of surface-attached linear polymer chains (g) crosslinked vesicles (h) shaved hollow nanospheres produced from cleavage of the internally and externally attached linear polymer chains from the structure of (g)...

Temperature- and pH-sensitive core-shell microgels consisting of a PNIPAAm core crosslinked with BIS and a polyvinylamine (PVAm) shell were synthesized by graft copolymerization in the absence of surfactant and stabilizer [106] The core-shell morphology of the microgels was confirmed by TEM and zeta-potential measurements. Other examples of core-shell microgel systems are PNIPAAm-g-P(NIPAM-co-styrene) colloids [107] or PS(core)-g-PNIPAAm (shell) particles [108],... 

Fig. 4 (a) Micelles formation in non-selective solvent and core-crosslinked nanoparticles, (b) Chemical structures of the implied copolymers. Reprinted from de Luzuriaga et al. [37]. Copyright 2010, with permission from Elsevier... 

Fig 15 Generalized scheme for preparing core-crosslinked nd shell-crosslinked nanospheres using block copolymers. 

Fig. 1S.1S. Steric protection strategy using PEO-b-PDAEMA-b-PMEMA triblock copolymer for preparing core-crosslinked nanospheres using high solids content. (Adapted from [59].)...

PMMA with dehydrochlorinated PVC were found miscible and easy to foam for the cryogenic insulation in space vehicles Copolymer of ethylene, 1 - 60 % acrylic ester and 1-30 % COj or SOj Core crosslinked silicone rubber inner shell crosslinked acrylate elastomer outer shell and styrene-AN copolymers... 

IPN crosslinked PBA, crosslinked uncrosslinked SAN Poly(p-hydroxy styrene), PVPh and EVAl Acrylic core-shell copolymer and either PBT or PET Poly(allyl methacrylate-co-butyl acrylate-co-butanediol dimethacrylate-co-styrene-co-methyl methacrylate) or poly (aery lonitrile-co-butyl aery late-co-tricy clodeceny 1 aery late-co- styrene) Poly(acrylate-V-cyclohexyl maleimide), PMI, and a copolymer PMMA — core, crosslinked butyl acrylate-styrene copolymer — middle layer, and PMMA shell d = 200-300 nm PEG/atactic PMMA blends were characterized by PVT at T = 20-200°C and P = 0-200 MPa. Free volume fraction was calculated from an equation of state... 

Matsumoto K, Matsuoka H (2005) Synthesis of core-crosslinked carbosilane block copolymer micelles and their thermal transformation to silicon-based ceramics nanoparticles. J Polym Sci A Polym Chem 43(17) 3778-3787... 

Recently, latexes were prepared with a crosslinked core, crosslinked interlayers, and a crosslinked shell. A seed latex was overcoated five times with various combinations of methyl methacrylate and butyl acrylate, allyl methacrylate serving as the crosslinker.Moldable products with good transparency, stress-clouding resistance, as well as impact and weathering resistance were attained. The subject was recently reviewed. 

Recently, Kissel et al. reported that the core crosslinking of the PEO-fc-PCL micelles not only improved the thermodynamic stability of the micelles... 

Abdullah Al, N., Lee, H., Lee, Y. S., Lee, K. D. and Park, S. Y. (2011) Development of disulfide core-crosslinked pluronic nanoparticles as an effective anticancer-drug-delivery system. Macromol Biosci, 11,1264-1271. 

Talelli, M., Iman, M., Varkouhi, A. K., Rijcken, C. I, Schiffelers, R. M., Etrych, T, Ulbrich, K., van Nostrum, C. E, Lammers, T, Storm, G. and Hennink, W. E. (2010a) Core-crosslinked polymeric micelles with controlled release of covalently entrapped doxorubicin. Biomaterials, 31,7797-804. 

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