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  • Polymer and Materials Science  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 36 (1998), S. 3035-3043 
    ISSN: 0887-624X
    Keywords: nanoencapsulation ; tyrosine ; dyes ; poly(isodecyl acrylate) ; nanoparticles ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The polymerization of isodecyl acrylate (ISODAC) in vesicles of sodium di-2-ethylhexyl phosphate (SEHP) loaded with dyes or tyrosine was achieved. The study of the polymerization rate-conversion curve of the monomer confirmed that this polymerization was different from other polymerizations known, as it was proposed previously. Then the entrapment of hydrophilic molecules such as tyrosine or brilliant cresyl blue and lipophilic molecules such as sudan III into the nanoparticles was evaluated and confirmed by different methods. While tyrosine was not retained, brilliant cresyl blue and sudan III were entrapped inside nanoparticles. The size and the polarity of the molecules to be encapsulated, which are related to their diffusion coefficients and partition coefficients between water and the nanoparticle, seem to be the parameters responsible of the entrapment. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 3035-3043, 1998
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 34 (1996), S. 729-737 
    ISSN: 0887-624X
    Keywords: vesicles ; polymerization kinetic ; sodium di-2-ethylhexyl phosphate ; isodecyl acrylate ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The polymerization of isodecyl acrylate (ISODAC) in vesicles made from an anionic surfactant - sodium di-2-ethylhexyl phosphate (SEHP) - and from water is studied by 1H-NMR, transmission electron microscopy, and quasielastic light scattering. High polymerization rates and high conversion rates are achieved with both water-soluble initiator, K2S2O8 (potassium persulfate), and oil-soluble initiator, AIBN (azoisobisbutyronitrile). ISODAC is probably located inside the vesicle bilayer(s) because of its high hydrophobicity. Particles stable at room temperature with a mean diameter of about 50 nm are obtained. Kinetic orders of ISODAC polymerization are determined and the characterization of the resulting particles during and after polymerization are studied. © 1996 John Wiley & Sons, Inc.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: This work is an attempt to provide antistatic properties to a commercial epoxy resin made up with Epikote 1001® and Euredur 423®. In this aim, two compounds were selected which could be chemically bonded to the resin network: (2,3-epoxypropyl)-trimethylammonium chloride which contains an epoxy group and the ammonium chloride group for the antistatic properties and also tetrabutylammonium 2-aminoethanesulfonate which contains an amino group and the tetrabutylammonium sulfonate group. Different formulations of the resin were prepared with both compounds, their viscosity and their resistivity were measured. Antistatic properties were obtained with the highest contents of epoxy compound. On the contrary no antistatic properties could be observed with the amino compound. Hardness and adherence tests have given suitable results for the antistatic formulations.
    Notes: Le but de cette étude est d'apporter des propriétés antistatiques durables à la résine époxy obtenue à partir d'Epikote 1001® et d'Euredur 423®. Deux composés pouvant se lier chimiquement à la résine ont été choisis: le chlorure de (2,3-époxypropyl)triméthylammonium qui contient un groupe époxy comme l'Epikote 1001® et un groupement chlorure d'ammonium pour les propriétés antistatiques et le 2-aminoéthanesulfonate de tétrabutylammonium qui contient un groupement amine comme l'Euredur 423® et le groupement sulfonate. Différentes formulations de la résine ont été préparées avec ces deux composés. Leur viscosité et leur résistivité ont été mesurées. Des propriétés antistatiques ont été observées avec des échantillons à taux élevé de composé époxyde. Par contre, le composé à groupement amine n'a montré aucune propriété antistatique. Des tests de dureté et d'adhérence se sont révèlés intéressants pour les formulations présentant des propriétés antistatiques.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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