Effect of Variations of Temperatures on the Compatibility of Poly(Methyl Methacrylate)/Polyvinyl Chloride in THF Ternary System

摘要

The intermolecular interaction between poly(methyl methacrylate) (PMMA) and polyvinyl chloride (PVC) in THF has been studied at different temperatures using dilute-solution viscometry method. The intrinsic viscosity and viscometric interaction prameter were experimentally measured for the binary (solvent/polymer) and ternary (solvent (1)/polymer (2)/polymer (3) systems. These results have served for the estimation of the compatibility of the polymer mixture at different temperaturs by means of the sign of DELTAb_m and DELTA[eta]_m. The results show that the polymer mixture is compatible in THF as the temperature increases, while the incompatibility observed at 34 deg C may be due to the enhancement in the interactions between THF and the polymers at this temperature.