نتایج جستجو برای: miniemulsion
تعداد نتایج: 237 فیلتر نتایج به سال:
We report a method to efficiently prepare multisegmented polymers via combination of step-growth (SG) and reversible addition-fragmentation chain transfer (RAFT) polymerization.
Suzuki-Miyam~polycondensatlbn of 2-( 4A,5;5tetramethyI -lJ3,2-dioxaborolan-2-yl)-7 -broino~9,9-dioctylfluor~ ene in aqueous miniemulsion With only tw'oequivalents of NaOH as~ base yields colloidally stable nanoparticles of polyfluorene With M;, ca. 2 X lQ4 g mol-1 and particle sizes of 40-85 nrn,depending on the surfactant concentration. Polymerization in the presen<:e of CdSe/CdS core/shell qu...
Ultrasonic transmission is a simple, non-destructive method to characterize turbid systems like e.g. emulsions or polymer dispersion. Here we use this technique for in-line monitoring of the miniemulsion polymerization of styrene. Either the ultrasound attenuation or the velocity signal provides a fingerprint characterizing the reaction process. During the reaction process the sound velocity in...
Higher solid contents (20 % and 40 %) nanocomposites of poly (styrene-co-butyl acrylate) including higher content of Cloisite 30B (7 wt% and 10 wt %) were prepared via miniemulsion polymerization. Stability of the final latexes proved outstanding combination of polymerization procedure and surfactants. Morphological studies revealed by TEM, SAX and XRD showed three structures of core-shell, arm...
For the first time we present the synthesis of CeO(2)/Si(O)C core-shell particles prepared by the miniemulsion technique. The Si(O)C core was obtained by means of a polycarbosilane precursor (SMP10), which was subsequently functionalized with ceria and pyrolyzed to the ceramic. The size of these particles could easily be adjusted by varying the surfactants and the surfactant concentration, or b...
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