Determination of Solubility Parameter of Polymer by Microwave Absorption in Waveguide

• Published in: KOBUNSHI RONBUNSHU Vol. 45; no. 2; pp. 161 - 168
• Main Authors: TATSUMI, Masakazu, YAMAGUTI, Yoshiteru, MORIWAKI, Shirou, USAMI, Shinichi, YAMAMOTO, Seika
• Format: Journal Article
• Language: English; Japanese
• Published: The Society of Polymer Science, Japan 1988
• Subjects: Dipole Interaction; Hydrogen Bonding; Microwave Absorption; Polymer; Solubility Parameter
• ISSN: 0386-2186; 1881-5685
• DOI: 10.1295/koron.45.161

Microwave absorption of mixed solutions of: 1) the hydrogen bonding solvents (methanol, ethanol, propanol, butanol. amyl alcohol, and octyl alcohol) and each of a number of hexane, carbon tetrachloride, benzene, and methanol; and 2) aproti polar solvents (nitromethane, acetonitrile, nitrobenzene, and dimethyl sulfoxide) and polar or nonpolarsolvents was measured at 9.3 GHz in a waveguide. At the same time, the magnitude of microwave decayed energy byvarious solvents in polymer films at 9.3 GHz was estimated. The sample film containing the solvent was placed in awaveguide, and the ratio of the amount of energy transmitted by the sample film to the amount incident was determined. The microwave absorption (A) was represented by the following equation: A= KCV, where C is the amount of solventin the polymer film, V is a volume of the sample film swollen by the solvent, and K is the microwave absorption constantof the solvent in the polymer. From plots of log (K/K0) against the solubility parameter of various solvents impregnatedwith the polymer film, we estimated the solubility parameter of various polymers: polystyrene, poly (butadiene), poly- (vinyl alcohol), and nylon-6, 6. Here, K0 is the constant of the solvent in cuprophane film. The results suggest that themicrowave absorption is dependent on a hydrogen bonding or a dipole-dipole interaction between the polymer andsolvent.