Excluded-Volume Effects in Dilute Polymer Solutions. I. Equilibrium Properties

作者: T. Norisuye , K. Kawahara , A. Teramoto , H. Fujita

DOI: 10.1063/1.1669878

关键词: ThermodynamicsAvogadro constantVirial coefficientSolventExcluded volumeFlory–Huggins solution theoryPolymerPolystyreneDimensionless quantityChemistryPolymer chemistry

摘要: Data of the statistical radius 〈 S2 〉1 / 2 and second virial coefficient A2 were obtained for sharp fractions polychloroprene (PCP) in methyl ethyl ketone (MEK), n‐butyl acetate, carbon tetrachloride at 25°C trans‐decalin temperatures ranging from 1° to 50°C. MEK 2°C found be theta solvents PCP. From these data two dimensionless quantities defined by αs2 = 〈 S2 〉 / 〈 S2〉0and Ψ = A2M1/2[4π3/2NA( 〈 S2 〉 / M3 / 2]−1 calculated all combinations molecular weight M, solvent species, temperature, where 〈 S2 〉0 is value 〈 S2 〉 under θ conditions NA Avogadro's number. These should functions a single parameter z, usually known as interaction parameter, which proportional M1/2. With present experiments on PCP well Berry's polystyrene, comparative tests typical theories excluded‐volume effects dilute polymer solutions ...

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