✍ Scribed by Holger Nilsson; Christer Silvegren; Bertil Törnell
No coin nor oath required. For personal study only.
The uptake of VCM by PVC particles prepared by emulsion polymerization at various temperatures, the solubility of VCM in water and the density of VCM vapour have been studied between 15 and 60 °. The swelling of PVC by VCM was almost independent of temperature. The solvent interaction parameter, X, calculated according to the Flory-Huggins equation, was strongly dependent on polymer concentration and showed a maximum value. The maximum uptake of VCM depended on the temperature of polymerization. PVC samples prepared at I 1, 50 and 90 ° showed maximum uptakes of 0.22, 0.29 and 0.37 kg VCM/kg PVC respectively. The influences of particle size and emulsifier concentration have been studied. The results indicate that VCM is solubilized in the surface layer of adsorbed emulsifier.
📜 SIMILAR VOLUMES
## Abstract A sensitivity analysis is performed to determine at what conditions the simplified model for swelling of latex particles by two monomers or two solvents is valid. This model proposes that, inter alia, the fractions of two monomers in the latex particles and in the monomer droplets are e
Carboxylated core-shell particles which contain carboxyl groups in the shell polymer swell in aqueous dispersion by electrostatic repulsion between carboxylate ions. Effects of hydrophobic interactions on the swelling of carboxylated coreshell particles were examined by measuring their diameters as