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14-September-2008 18:38:37 - ATRP chemistry ATRP or Atom Transfer Radical Polymerization is a polymerization reaction involving free radicals. It was introduced as an extension to ATRA or Atom Transfer Radical Addition by Jin-Shan Wang, Krzysztof Matyjaszewski 1995 and Mitsuo Sawamoto et al. 1994/5. As a living radical polymerization which is a form of living polymerization, it allows the reaction to be carried out in a controlled way, and can be used to obtain polymers with high molecular weight and low polydispersity index. This control result from the use of a transition metal based catalyst. This catalyst provides an equilibrium between active, and therefore propagating, polymer and an inactive form of the polymer; known as the dormant form. Since the dormant state of the polymer is vastly preferred in this equilibrium, side reactions are suppressed. By lowering the concentration of radicals, termination is suppressed and control is achieved. In this scheme, the ATRP with styrene is depicted as an example of ATRP. If all the styrene is reacted the conversion is 100% the polymer will have 100 units of styrene built into it. PMDETA stands for N,N,N',N,N pentamethyldiethylenetriamine. In this scheme, the ATRP with styrene is depicted as an example of ATRP. If all the styrene is reacted the conversion is 100% the polymer will have 100 units of styrene built into it. PMDETA stands for N,N,N',N,N pentamethyldiethylenetriamine. See also Heteropolymer Radical chemistry References Fried, Joel, 2003. Polymer Science Technology 2nd Ed, Chap 2. Prentice Hall. ISBN 0-13-018168-4. Retrieved from http://en..org/wiki/ATRP_chemistry Categories: Polymer chemistry Views Article Discussion this page History Personal tools Log in / create account Navigation Main page Contents Featured content Current events Random article Search Go Search Interaction Community portal Recent changes Contact Donate to Help Toolbox What links here Related changes Upload file Special pages Printable version Permanent link Cite this page Languages Deutsch Français Polski This page was last modified on 20 July 2008, at 19:20
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