Download Block Copolymers in Nanoscience by Massimo Lazzari, Guojun Liu, Sebasti?n Lecommandoux PDF

By Massimo Lazzari, Guojun Liu, Sebasti?n Lecommandoux

This primary e-book to take an in depth examine one of many key focal issues the place nanotechnology and polymers meet offers either an introductory view for newcomers in addition to in-depth wisdom for experts within the quite a few study components concerned. It investigates all kinds of program for block copolymers: as instruments for fabricating different nanomaterials, as structural elements in hybrid fabrics and nanocomposites, and as sensible fabrics. The multidisciplinary technique covers all levels from chemical synthesis and characterization, proposing functions from physics and chemistry to biology and medication, resembling micro- and nanolithography, membranes, optical labeling, drug supply, in addition to sensory and analytical makes use of.

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This also includes comprehensive theoretical and computational studies to predict the morphological behavior of block copolymers possessing incompatible blocks. For all these reasons, block copolymers have been investigated extensively in recent decades from both practical and theoretical aspects [1, 5]. The present chapter is devoted to the synthetic strategies for block copolymers, from traditional routes to more recent developments. “ In recent decades, advances in polymer chemistry through the development of controlled/living” polymerization (CLP) techniques [6] have actually permitted block copolymers to be arranged * A list of abbreviations is provided at the end of this chapter.

11 Chemical Modification of Pre-formed Block Copolymers Pre-formed block copolymers obtained by any of the methods discussed above (see Fig. 2) can be chemically modified and form novel copolymeric materials. The molecular characteristics of the block copolymers obtained (chain length, composition and architecture) is fixed by the initial method used to synthesize the pre-formed block copolymer. The chemical modification is generally supposed to be sufficiently mild to avoid chain degradation, cross-linking.

8 Controlled Radical Polymerization Radical processes are utilized extensively in industry with about 50 % of polymeric materials being produced by this chain polymerization [16]. Compared with ionic polymerization techniques, free radical processes offer the advantage of being applicable to a wider variety of monomers and are not as demanding as other chain addition mechanisms with respect to the purity of the reagents used. Radical processes can be implemented in an emulsion, suspension, solution or in bulk.

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