alexa Influence of micromixer characteristics on polydispersity index of block copolymers synthesized in continuous flow microreactors.
Materials Science

Materials Science

Journal of Nanomedicine & Nanotechnology

Author(s): Rosenfeld C, Serra C, Brochon C, Hadziioannou G

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Abstract The influence of interdigital multilamination micromixer characteristics on monomer conversions, molecular weights and especially on the polydispersity index of block copolymers synthesized continuously in two microtube reactors is investigated. The micromixers are used to mix, before copolymerization, a polymer solution with different viscosities and the second monomer. Different geometries of micromixer (number of microchannels, characteristic lengths) have been studied. It was found that polydispersity indices of the copolymers follow a linear relationship with the Reynolds number in the micromixer, represented by a form factor. Thus, beside the operating conditions (nature of the first block and comonomer flow rate), the choice of the micromixer geometry and dimension is essential to control the copolymerization in terms of molecular weights and polydispersity indices. This linear correlation allows the prediction of copolymer features. It can also be a new method to optimize existing micromixers or design other geometries so that mixing could be more efficient. This article was published in Lab Chip and referenced in Journal of Nanomedicine & Nanotechnology

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