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Home  >  Journal list  >  Polymer Journal  >  Vol.3  No.6 (1972)  >  pp.647-662

Polymer Journal
<<Previous article Vol.3  No.6 (1972)   pp.647 - 662 Next article>>

Study of Linear Poly(p-chlorostyrene)–Diluent Systems. I. Solubilities, Phase Relationships, and Thermodynamic Interactions

Yoshinobu Izumi1) and Yasuhiro Miyake1)
1) Department of Polymer Science, Faculty of Science, Hokkaido University

ABSTRACT:  The solubilities of poly(p-chlorostyrene) (PPCS) were examined for about ninety solvents. The solvents employed were aliphatic, aromatic and chlorinated hydrocarbons, ethers, esters, ketones, alcohols, and others. The solubilities were successfully interpreted by the three dimensional plots according to Crowley, Teague, and Lowe, in which the solubility parameter, dipole moment, and hydrogen bonding parameter were used as three components, and to Hansen, who devided the solubility parameter into dispersion, polar and hydrogen bonding components. It can be seen that the soluble region is found to be inside the closed surface in the three-dimensional plots. The present systems involve some with either LCST or UCST. The difference between the PPCS–solvent system with LCST and that with UCST is reflected in the relative contribution of the three components rather than in the structure of the solvent. Furthermore, the phase relationships of PPCS were investigated. The eleven theta solvents found in this work contain both the four theta solvent with LCST, i.e., isopropyl acetate (θ=75.7°C), t-butyl acetate (θ=65.4°C), ethylcarbitol (θ=27.8°C) and n-butylcarbitol (θ=50.1°C), and the seven theta solvents with UCST, i.e., ethylbenzene (θ=−14.7°C), isopropylbenzene (θ=59.0°C), carbon tetrachloride (θ=50.7°C), tetrachloroethylene (θ=44.4°C), methyl chloroacetate (θ=64.6°C), ethyl chloroacetate (θ=−1.8°C), and isopropyl chloroacetate (θ=−8.2°C). It is considered from these phase relationships and from calorimetric measurements in the corresponding monomer solutions for esters that the theta solvent with LCST corresponds to an exothermic solvent and that characterized by UCST to an endothermic one.


Keyword:
Poly(p-chlorostyrene)/ Solubility/ Theta Solvent/ LCST/ UCST/ Phase Relationship/ Thermodynamic Parameter/ Three-Dimensional Solubility Parameter

Published online: March 30, 2006
© Copyright, 2006 by The Society of Polymer Science, Japan

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