✦ LIBER ✦

Excluded volume effect for solutions of cellulose derivatives evaluated by wormlike chain model

✍ Scribed by Kenji Kamide; Masatoshi Saito

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 340 KB
Volume: 19
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(83)90201-x

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✦ Synopsis

Third-power law type equations of the linear expansion factor ~, and of the excluded volume effect gh(g), expressed by a conventional notation, are derived for a wormlike chain as an extension of the Yamakawa and Stockmayer theory [J. chem. Phys. 57, 2843(1972)], in which the corresponding fifth-power law type equations were obtained. The literature data on 11 systems of solutions of cellulose and its derivatives are analysed, by using a penetration function method based on the derived equations, to evaluate an excluded volume effect for a wormlike chain model. The results are compared with those deduced for a pearl necklace model.

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Orientation of Polymer Chains in Dilute

Orientation of Polymer Chains in Dilute Solution under Shear: Effect of Chain Model and Excluded Volume

✍ José G. Hernández Cifre; José García de la Torre 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 122 KB

## Abstract **Summary:** Polymer orientation in dilute solutions undergoing shear flow is investigated computationally by means of the Brownian dynamics simulation technique applied to the bead‐spring chain model. The dependence of the degree of orientation on the shear intensity is evaluated throu