Hsu J.-P.Lin S.-H.2019-05-202019-05-20200500143057https://scholars.lib.ntu.edu.tw/handle/123456789/409343The concentration dependency of the diffusivity of a solvent in a polymer solution is derived on the basis of a free volume theory. Applying a molecular kinetics approach, the Fujita-Doolittle equation is modified. The result of numerical simulation reveals that the diffusivity of solvent in a polymer solution depends largely on both the polymer chain structure and its concentration. The applicability of the analytical expression derived is justified by fitting the experimental data for n-alkyl acetate-(poly-methyl acrylate) polymer solutions in the literature. ? 2004 Elsevier Ltd. All rights reserved.Diffusivity of solventExpansive free volumeFujita-Doolittle equationRetardation effectThermal expansive coefficientjournal article10.1016/j.eurpolymj.2004.11.0162-s2.0-14544286403https://www.scopus.com/inward/record.uri?eid=2-s2.0-14544286403&doi=10.1016%2fj.eurpolymj.2004.11.016&partnerID=40&md5=19da3fea08bcbbe9bff0011698ae57b6