Emulsion polymerization reactions constitute complex, nonequilibrium systems in which there is strong interaction between polymers, monomers, and the colloidal structures that mediate the reactions. A novel and general method was sought to monitor emulsion polymerization reactions. Instrumentation and methods were hence developed here to achieve, for the first time, simultaneous monitoring of t...

The efficient synthesis of all-acrylic, film-forming, core-shell colloidal nanocomposite particles via in situ aqueous emulsion copolymerization of methyl methacrylate with n-butyl acrylate in the presence of a glycerol-functionalized ultrafine silica sol using a cationic azo initiator at 60 °C is reported. It is shown that relatively monodisperse nanocomposite particles can be produced with ty...

-A method for optimization of monomer feed composition to obtain the most accurate reactivity ratios has been described by Tidwell and Mortimer. The proposed method is more generally applicable than for use with the Mayo-Lewis model and copolymer composition vs monomer feed composition data. By means of a simulated example involving the penultimate unit models the effect of experimental design ...

Epoxy-based materials are extensively used in industry due to their excellent mechanical and thermal stability. As the epoxy products are getting smaller and smaller nowadays, there are difficulties arising from the material processing and measurement, which need to be carefully considered in the design stage. SU-8 photoresist, which is commonly used in micro-electro-mechanical systems (MEMS), ...

This computational and theoretical study deals with chain transfer to solvent (CTS) reactions of methyl acrylate (MA), ethyl acrylate (EA), and n-butyl acrylate (n-BA) self-initiated homopolymerization in solvents such as butanol (polar, protic), methyl ethyl ketone (MEK) (polar, aprotic), and p-xylene (nonpolar). The results indicate that abstraction of a hydrogen atom from the methylene group...

A series of novel half-titanocene complexes CpTiCl2[S-2-R-6-(PPh2)C6H3] (Cp = C5H5, 2a, R = H; 2b, R = Ph; 2c, R = SiMe3) have been synthesized by treating CpTiCl3 with the sodium of the ligands, 2-R-6-(PPh2)C6H3SNa, which were prepared by the corresponding ligands and NaH. These complexes have been characterized by H, C and P NMR as well as elemental analyses. Structures for 2a–b were further ...

........................................................................................................................ 1 1.0 Introduction .......................................................................................................................... 1 1.1 Storage Stability Problem.......................................................................... 1 1.2 Combustion Problems Ca...

Supported olefin polymerization catalysts can prevent reactor-fouling problems and produce uniform polymer particles. Constrained geometry complexes (CGCs) have less sterically hindered active sites than bis-cyclopentadienyl metallocene catalysts. In the literature, micrometer-sized silica particles were used for supporting CGC catalysts, which might have strong mass transfer limitations. This ...

Objective: The objective of this study was to examine and characterize topical eye drops with indomethacin-loaded poly(vinyl acetate) nanoparticles (IMC-p(VAc)-NPs). Methods: IMC-p(VAc)-NPs were obtained by emulsifier-free radical homopolymerization of the monomers in the presence of indomethacin in water and in an aqueous solution of Carbopol®. Thus obtained indomethacin nanocarriers were incl...