Butyl Acrylate
Mostrando 13-23 de 23 artigos, teses e dissertações.
-
13. Monitoramento em linha de reações de copolimerização em emulsão de acetato de vinila e acrilato de butila em um reator contínuo pulsado de pratos perfurados usando espectrocospia NIR. / In-line monitoring of vinyl acetate and butyl acrylate emulsion copolymerization in a continuous pulsed sieve plate reactor using NIR spectroscopy.
This work deals with the study of the viability and sensitivity of the on-line monitoring, using NIR spectroscopy, of monomers and polymer concentration and average particle size during continuous vinyl acetatebutyl acrylate emulsion copolymerization carried out in a novel tubular pulsed sieve plate reactor. For the elaboration of NIR calibration models of t
Publicado em: 2009
-
14. Protein decorated Nanoparticules : Small Unilamellar Lipid Vesicules and Block Copolymers Micelles. / Nanoparticules Décorées par des Protéines : Vésicules Lipidiques Unilamellaires et Micelies à Base de Copolymères à Blocs
The formation of protein Annexin-A5 decorated (bio-functionalized) nanoparticles is of particular interest in micelle-mediated target drug delivery, in vivo magnetic resonance imaging, or controlled fabrication of biochips. This work describes an easy access to the synthesis and manipulation of block copolymer nano-objects exhibiting binding ability for the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/07/2008
-
15. Desenvolvimento de processo contínuo de copolimerização em emulsão em reator tubular. / Development of a continuous emulsion copolymerization process in a tubular reactor.
Industrial emulsion polymerization processes are usually performed in batch or semi-batch stirred tanks, or in continuous stirred tank reactors (CSTR). Continuous reactors have the advantage of being smaller and providing a better product quality control by the reduction of the batch-to-batch variations. In addition, periodical self-sustained oscillations in
Publicado em: 2008
-
16. Monitoring emulsion homopolymerization reactions using FT-Raman spectroscopy
The present work describes a methodology for estimation of monomer concentration during homopolymerization reactions by Raman spectroscopy. The estimation is done using linear models based on two different approaches: a univariate approach and a multivariate approach (with principal component regression, PCR, or partial least squares regression, PLS). The li
Brazilian Journal of Chemical Engineering. Publicado em: 2005-03
-
17. Estudo da copolimerização em emulsão de estireno e acrilato de butila com alto teor de sólidos em reator semicontínuo. / Study of the emulsion copolymerization of styrene and butyl acrylate with high solid contents in a semi-batch reactor.
Neste trabalho estudou-se o processo de coplimerização em emulsão de estireno e acrilato de butila em processo semicontínuo onde o produto final é um látice com alto teor de sólidos. Foi realizada uma série de experimentos de copolimerização em emulsão em um reator de vidro, empregando receitas com teores de sólidos na faixa de 50 a 64% em massa.
Publicado em: 2005
-
18. Simulation of emulsion copolymerization reactions in a continuous pulsed sieve-plate column reactor
This work addressed the viability of using a pulsed sieve-plate column reactor to carry out continuous vinyl acetate/butyl acrylate emulsion copolymerization reactions. A rigorous mathematical model of emulsion copolymerization reactions in a tubular reactor with axial dispersion was used for this purpose. Operational conditions were defined to attain high m
Brazilian Journal of Chemical Engineering. Publicado em: 2004-09
-
19. A new approach to the joined estimation of the heat generated by a semicontiunuous emulsion polymerization Qr and the overall heat exchange parameter UA
This work is concerned with the coupled estimation of the heat generated by the reaction (Qr) and the overall heat transfer parameter (UA) during the terpolymerization of styrene, butyl acrylate and methyl methacrylate from temperature measurements and the reactor heat balance. By making specific assumptions about the dynamics of the evolution of UA and Q R,
Brazilian Journal of Chemical Engineering. Publicado em: 2004-06
-
20. Surfactant and counter-ion distribution in styrene-butyl acrylate-acrylic acid dry latex submonolayers
Submonocamadas de látex estireno-acrílico preparado usando um tensoativo sulfonato reativo e um tensoativo fosfato não-reativo foram examinadas em um microscópio de transmissão equipado com um espectrômetro de perda de energia de elétrons, para a aquisição de mapas de distribuição elementar. P está ausente do centro das partículas mas é encontr
Journal of the Brazilian Chemical Society. Publicado em: 2004-02
-
21. Estudo comparativo entre observador de estado não-linear de alto ganho e calorimetria associada a redes neurais artificiais para previsão de composição de copolimeros produzidos em emulsão com altos teores solidos
High solid content lattices produced by emulsion polymerization have a great importance in the polymeric industry, not only for environmental reasons, since they usually have water as continuous phase, but also for economic motive, because these processes result in more polymeric material by volume of latex. The worry with the final application quality of th
Publicado em: 2003
-
22. Propriedades mecanicas e termicas, morfologia e reologia de blendas de poliamida-6 e elastomeros
Blends of polyamide-6 (PA-6) and elastomers is the central subject of this thesis. The work can be subdivided in three parts according to the type of rubber used, each part has specific objectives. In the first part, the mechanical properties and phase morphology of ternary blends of polyamide 6 with rubber, e.g., maleated ethylene-propylene random copolymer
Publicado em: 1999
-
23. AB-polymer networks based on oligo(ɛ-caprolactone) segments showing shape-memory properties
Although shape-memory metal alloys have wide use in medicine and other areas, improved properties, particularly easy shaping, high shape stability, and adjustable transition temperature, are realizable only by polymer systems. In this paper, a polymer system of shape-memory polymer networks based on oligo(ɛ-caprolactone) dimethacrylate as crosslinker a
The National Academy of Sciences.