Phase Equilibria and Mutual Diffusion in Polymer – Polymer Systems with Chlorine-containing Components

Phase equilibria and phase structures of polymer blends

“…As an example, we refer to the results of structural ± morphological studies of blends of poly(vinyl chloride) (PVC) and poly(methyl methacrylate) (PMMA) prepared according to different methods: using a common solvent, polymerisation of methyl methacrylate in PVC, extrusion and pressing. 55,56 It should be noted that investigations of the phase structures of these materials were carried out either at room temperature (static sorption of tetrahydrofuran and X-ray microanalysis) or using continuous heating to determine the glass transition temperatures and rheological parameters at temperatures higher than their flow temperatures. The results of measurements for this system are summarised in Fig.…”

“…Phase diagrams of the PVC ± PMMA system with the following molecular masses: 1.4610 5 ± 7.36105 (1), 1.4610 5 ± 36105 (2), 1.4610 5 ± 1.96105 (3), 1.6610 4 ± 8610 4 (4), 5.5610 4 ± 86104 (5), 5.5610 4 ± 66104 (6). Curves (1 ± 3),55 (4 ± 6) 71.…”

Phase Equilibrium and Interdiffusion in Blends of Polystyrene with Polyacrylates

“…Despite the fact that the statistical copolymers PBA and PS were among the first on which the method of labeled atoms was tested for the experimental evaluation of the self-diffusion coefficients of macromolecules [ 24 ], their translational mobility was practically not studied in the future. Only in works [ 4 , 6 , 10 ], with the use of NMR in a pulsed gradient and by the method of laser microinterferometry [ 20 , 22 ], was a comprehensive study of the diffusion and solubility of PSs of various molecular weights in block and gradient copolymers of n -butyl acrylate carried out, self-diffusion coefficients of PBA colloidal particles measured, the partial diffusion coefficients of PS macromolecules into the matrix of the copolymer of PBA and PS and of the copolymer into the matrix of PS determined, the coefficients of friction of macromolecules and monomer units calculated, and the activation energies of the translational mobility of macromolecules determined.…”