Polymère de condensation

Résumé

vignette|Le polytéréphtalate d'éthylène est un polymère de condensation courant. Les polymères de condensation concernent tout type de polymères formés par une réaction de condensation perdant de petites molécules, les sous-produits tels que l'eau ou le méthanol. Les polymères de condensation sont formés par polycondensation, lorsque le polymère est formé par des réactions de condensation entre des espèces de tous degrés de polymérisation, ou par polymérisation en chaîne par condensation, lorsque le polymère est formé par addition séquentielle (par réaction de condensation) de monomères à un site actif dans une réaction en chaîne. Les principales formes alternatives de polymérisation sont la polymérisation en chaîne et la polyaddition, qui donnent toutes deux des polymères d'addition. La polymérisation par condensation est une forme de polymérisation par étapes. Les polymères linéaires sont produits à partir de monomères bifonctionnels, c'est-à-dire de composés à deux groupes terminau

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https://fr.wikipedia.org/wiki/Polym%C3%A8re_de_condensation

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Introduction to the application of the notions and methods of theoretical physics to problems in biology.

Know modern methods of polymer synthesis. Understand how parameters, which determine polymer structure and properties, such as molecular weight, molecular weight distribution, topology, microstructure can be controlled by proper choice of polymerization method and optimization of reaction condition

This course provides a basic foundation in organic chemistry and polymer chemistry, including chemical nomenclature of organic compounds and polymers, an understanding of chemical structures, chemical reaction mechanisms, as well as methods of organic and polymer synthesis.

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One-pot photoinduced synthesis of conductive polythiophene-epoxy network films

Marco Sangermano, Federica Sordo

In this paper, we describe a novel methodology for fabricating conductive epoxy-polythiophene network films by simultaneous photoinduced step-growth and cationic ring opening polymerization processes. For this purpose, formulations containing a bifunctional epoxy monomer, namely 1,6-hexanediol diglycidyl ether (HDGE) and different amount of thiophene ranged from 0 to 50 wt% in the presence of an iodonium salt, namely (4-methylphenyl)[4-(2-methylpropyl) phenyl]-iodonium, hexafluorophosphate were irradiated under UV light. In the process, while polythiophene was formed through electron transfer reaction between photochemically formed phenyliodinium radical cations followed by proton release and coupling reactions, cationic ring opening polymerization of HDGE initiated by the liberated protons resulted in the formation of epoxy network. Conductivity of the obtained films was evaluated by surface resistivity measurements by means of a standard two-point micro-contact method before and after iodine doping. It was found that iodine doping provided a significant improvement in the surface conductivity. This work conclusively provides a new approach for bonding conducting polymers with epoxy-based network films via photoinduced electron transfer reactions in a simple, fast, and efficient approach of importance in electronic and other applications. (C) 2013 Elsevier Ltd. All rights reserved.

Elsevier Sci Ltd2013

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Chain-Shattering Polymeric Therapeutics with On-Demand Drug-Release Capability

Liang Ma, Li Tang

Trigger happy: Trigger-responsive chain-shattering polymeric therapeutics (CSPTs) were prepared by condensation polymerization of a UV- or hydrogen peroxide-responsive domain and a drug as co-monomers. Drug release can be started and stopped by starting and stopping the trigger treatment. Chemotherapeutic-containing CSPTs showed trigger-responsive in vitro and in vivo antitumor efficacy.

Wiley-Blackwell2013

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Protein mimetics (TASP) by sequential condensation of peptide loops to an immobilised topological template

The sequential condensation of peptide loops onto selectively addressable templates immobilised on solid supports allows the rapid and efficient synthesis of protein mimetics applying the TASP (Template Assembled Synthetic Protein) concept. As an example of the versatility of this methodology, we describe here the solid phase assembly of a representative 3-loop receptor mimetic. (C) 1997 Elsevier Science Ltd.

1997

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