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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 8, Number 4
April 20, 1987 

Non-Newtonian Intrinsic Viscosities of Biopolymeric and Nonbiopolymeric Solutions (Ⅰ)
Chun Hag Jang, Jong Ryul Kim, Taikyue Ree*
Experimental results for viscous flow of poly (γ -methyl L-glutamate) solutions have been published elsewhere. The data of [η]f / [η]0 are expressed by the following equation, [η]f / [η]0 = 1 - {A / [η]0}{1 - [sinh-1 [β2 (f / η0) exp( - c2f2 / η02kT)]] / (β2f / η0)} (A1) where [η]f and [η ]0 are the intrinsic viscosity at shear stress f and zero, respectively, A ≡ limc→0 [(1/C)(x2 / α2)(β2 / η0)], η0 viscosity of the solvent, β 2 is the relaxation time of flow unit 2, c2 is a constant related to the elasticity of flow unit 2. The theoretical derivation of Eq.(A1) is given in the text. The experimental curves of [η]f / [η]0 vs. log f are compared with the theoretical curves calculated from Eq.(A1) with good results. Eq.(A1) is also applied to non-biopolymeric solutions, and it was found that in the latter case c2 = 0. The reason for this is explained in the text. The problems related to non-Newtonian flows are discussed.
318 - 324
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