Ultrasonic and spectroscopic investigation of Polychloroprene and Poly Methyl Methacrylate blends

Polymer blends are mixture of two structurally different polymers bonded together by secondary force. Study of polyblend solutions and multiphase polymer systems are useful for industrial development and solve technical problems and upgrade the products by working with existing materials. In order to utilize polymers to create new multi-component polymer systems the fundamental principles related with their microstructures, solubility, phase separation, thermodynamical properties and degradation must be studied. Recently the use of ultrasonic waves has shown a great potential for characterization of polymer blends. The molecular interactions study using low amplitude ultrasonic waves retain intrinsic state of polymer solution. The polymers under investigation are perturbed by such waves but no permanent changes are induced. In present paper ultrasonic velocity, density measurements are performed on solution blends of Polychloroprene and Poly Methyl Methacrylate in various blend ratios using Tetrahydrofuran (THF) as solvent. Thermo-acoustical parameters viz. Fractional free volume(f’), Repulsive exponent (n’), Moelwyn-Hughes parameter (C1), Beyer’s non-linearity parameter (B/A), Observed absorption (α/f2)obs have been computed from the experimental data. Polychloroprene and Poly Methyl Methacrylate blends were characterized at the molecular level by FTIR spectroscopy. The nature of polymer-polymer and polymer-solvent interactions and effect of blend ratio on molecular interactions have been studied.Polymer blends are mixture of two structurally different polymers bonded together by secondary force. Study of polyblend solutions and multiphase polymer systems are useful for industrial development and solve technical problems and upgrade the products by working with existing materials. In order to utilize polymers to create new multi-component polymer systems the fundamental principles related with their microstructures, solubility, phase separation, thermodynamical properties and degradation must be studied. Recently the use of ultrasonic waves has shown a great potential for characterization of polymer blends. The molecular interactions study using low amplitude ultrasonic waves retain intrinsic state of polymer solution. The polymers under investigation are perturbed by such waves but no permanent changes are induced. In present paper ultrasonic velocity, density measurements are performed on solution blends of Polychloroprene and Poly Methyl Methacrylate in various blend ratios using Tetrahydrofura...