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| Artículos de revistas
Elemental distribution within single latex particles: Determination by electron spectroscopy imaging
| dc.creator | Cardoso, AH | |
| dc.creator | Leite, CAP | |
| dc.creator | Galembeck, F | |
| dc.date | 1998 | |
| dc.date | 39965 | |
| dc.date | 2014-12-02T16:25:57Z | |
| dc.date | 2015-11-26T16:44:08Z | |
| dc.date | 2014-12-02T16:25:57Z | |
| dc.date | 2015-11-26T16:44:08Z | |
| dc.date.accessioned | 2018-03-28T23:29:22Z | |
| dc.date.available | 2018-03-28T23:29:22Z | |
| dc.identifier | Langmuir. Amer Chemical Soc, v. 14, n. 12, n. 3187, n. 3194, 1998. | |
| dc.identifier | 0743-7463 | |
| dc.identifier | WOS:000074190400009 | |
| dc.identifier | http://www.repositorio.unicamp.br/jspui/handle/REPOSIP/64645 | |
| dc.identifier | http://www.repositorio.unicamp.br/handle/REPOSIP/64645 | |
| dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/64645 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1273818 | |
| dc.description | Particles of a poly[styrene-co-(2-hydroxyethyl methacrylate)] latex were prepared and examined by electron spectroscopy imaging (ESI), using an energy-filtered transmission electron microscope (EFTEM). Both whole particles and thin ultramicrotomed sections were examined, in the brightfield and energy-loss modes. The following elemental distributions were determined, for the larger particles in the latex: (i) C is rather uniformly distributed throughout the raspberry-like latex particles; (ii) O is also distributed throughout the particles but with significant fluctuations from point to point, and it is more concentrated in the vicinity of the particle surfaces; (iii) S distribution resembles that of C, but it is absent from the particle-particle contact areas; (iv) K is mostly found in a thin outer particle layer. Elemental distribution patterns in the smaller particles are different: these have a higher O/C ratio, and K is dispersed in the bulk of the particles. The main conclusions are as follows: hydrophobic and hydrophilic domains are distributed throughout the particles; negative charges are trapped in the particle bulk, and countercations are dispersed in the bulk (small particles) or concentrated at the surfaces (large particles); these results are consistent with particle formation by homogeneous nucleation, following previous work by the Fitch and Okubo groups. | |
| dc.description | 14 | |
| dc.description | 12 | |
| dc.description | 3187 | |
| dc.description | 3194 | |
| dc.language | en | |
| dc.publisher | Amer Chemical Soc | |
| dc.publisher | Washington | |
| dc.publisher | EUA | |
| dc.relation | Langmuir | |
| dc.relation | Langmuir | |
| dc.rights | fechado | |
| dc.source | Web of Science | |
| dc.subject | Polymerization Conditions | |
| dc.subject | Emulsion Polymerization | |
| dc.subject | Interfacial Phenomena | |
| dc.subject | Net Distribution | |
| dc.subject | Morphology | |
| dc.subject | Microscopy | |
| dc.subject | Methacrylate | |
| dc.subject | Copolymers | |
| dc.subject | Suspension | |
| dc.subject | Polymers | |
| dc.title | Elemental distribution within single latex particles: Determination by electron spectroscopy imaging | |
| dc.type | Artículos de revistas |