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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 Non-biopolymeric Solutions (Ⅱ)
Chun Hag Jang, Chang Hong Kim, Taikyue Ree*
This paper is a continuation of our previous paper1, and deals with Eq.(1) (see the text), which was theoretically derived in the paper1, [η ]f and [η]0 is the intrinsic viscosity at stress f and f = O, respectively. Equation (1) predicts how [η]f / [η]0 changes with stress f, relaxation time β2 of flow unit 2 and a constant c2 related with the elasticity of molecular spring of flow unit 2. In this paper, Eq.(1) is applied to a biopolymer, e.g., poly (γ-benzyl L-glutamate), and nonbiopolymers, e.g., polyisobutylene, polystyrene, polydimethylsiloxane and cellulose triacetate. It was found that the c2 factor is zero for non-biopolymers while c2 ≠ 0 for biopolymers as found previously1. Because of the non-Newtonian nature of the solutions, the ratio [η]f / [η]0 drops from its unity with increasing f. We found that the smaller the β2, the larger the fc at which the viscosity ratio drops from the unity, vice versa.
332 - 335
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