Self diffusion in solutions of polyvinyl chloride and polystyrene with phthalates

The self diffusion of phthalate molecules and macromolecules has been investigated in PVC and PS solutions with low polymer contents, using a pulse NMR method. The coincidence appearing in regard to activation energies of self diffusion of the macromolecules and phthalate molecules is explained on the basis of the Frenkel theory. It is proposed that the dissolved macromolecules play the role of traps for rapidly diffusing solvent molecules. It is shown that the translational mobility of phthalate molecules in the temperature region examined is mainly determined by activated jumps. The space network in PVC gels does not influence the mobility of phthalates. © 1980

NMR relaxation and the state of solvent molecules in solutions of polyvinylchloride and polystyrene in dibutylphthalate

An analysis was made of temperature concentration dependences of spin-spin relaxation time and the coefficient of self-diffusion of dibutylphthalate molecules in solutions containing 0-20 vol. % PVC and PS. It was established that, in contrast with the PS solution, PVC solutions contain a small proportion of dibutylphthalate molecules, which are more inhibited, compared with the remaining mass of solvent, and are exchanged with the latter. © 1983

Self diffusion in solutions of polyvinyl chloride and polystyrene with phthalates

The self diffusion of phthalate molecules and macromolecules has been investigated in PVC and PS solutions with low polymer contents, using a pulse NMR method. The coincidence appearing in regard to activation energies of self diffusion of the macromolecules and phthalate molecules is explained on the basis of the Frenkel theory. It is proposed that the dissolved macromolecules play the role of traps for rapidly diffusing solvent molecules. It is shown that the translational mobility of phthalate molecules in the temperature region examined is mainly determined by activated jumps. The space network in PVC gels does not influence the mobility of phthalates. © 1980

NMR relaxation and the state of solvent molecules in solutions of polyvinylchloride and polystyrene in dibutylphthalate

An analysis was made of temperature concentration dependences of spin-spin relaxation time and the coefficient of self-diffusion of dibutylphthalate molecules in solutions containing 0-20 vol. % PVC and PS. It was established that, in contrast with the PS solution, PVC solutions contain a small proportion of dibutylphthalate molecules, which are more inhibited, compared with the remaining mass of solvent, and are exchanged with the latter. © 1983

Self diffusion in solutions of polyvinyl chloride and polystyrene with phthalates

The self diffusion of phthalate molecules and macromolecules has been investigated in PVC and PS solutions with low polymer contents, using a pulse NMR method. The coincidence appearing in regard to activation energies of self diffusion of the macromolecules and phthalate molecules is explained on the basis of the Frenkel theory. It is proposed that the dissolved macromolecules play the role of traps for rapidly diffusing solvent molecules. It is shown that the translational mobility of phthalate molecules in the temperature region examined is mainly determined by activated jumps. The space network in PVC gels does not influence the mobility of phthalates. © 1980

NMR relaxation and the state of solvent molecules in solutions of polyvinylchloride and polystyrene in dibutylphthalate

An analysis was made of temperature concentration dependences of spin-spin relaxation time and the coefficient of self-diffusion of dibutylphthalate molecules in solutions containing 0-20 vol. % PVC and PS. It was established that, in contrast with the PS solution, PVC solutions contain a small proportion of dibutylphthalate molecules, which are more inhibited, compared with the remaining mass of solvent, and are exchanged with the latter. © 1983

Self diffusion in solutions of polyvinyl chloride and polystyrene with phthalates

The self diffusion of phthalate molecules and macromolecules has been investigated in PVC and PS solutions with low polymer contents, using a pulse NMR method. The coincidence appearing in regard to activation energies of self diffusion of the macromolecules and phthalate molecules is explained on the basis of the Frenkel theory. It is proposed that the dissolved macromolecules play the role of traps for rapidly diffusing solvent molecules. It is shown that the translational mobility of phthalate molecules in the temperature region examined is mainly determined by activated jumps. The space network in PVC gels does not influence the mobility of phthalates. © 1980