Liquid-crystalline ordering in the solution of partially flexible macromolecules |
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Authors: | AR Khokhlov AN Semenov |
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Institution: | Physics Department, Moscow State University, Moscow 117234, USSR |
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Abstract: | The liquid-crystalline ordering in the solution of persistent chains which length, L, is comparable with the length of the effective Kuhn segment, l, is considered by means of a generalization of the Onsager method. The orientational entropy for this case is calculated using the method proposed by I.M. Lifshitz (for another problem) in 1968. It is shown that a slight flexibility of the persistent chain is sufficient for the complete change in the properties of the liquid-crystalline transition: for example, at ~0.1 these properties are more similar to those which are characteristic for the semi-flexible limit (?1), than for the rigid rod limit (?1), although at such the geometric form of the macromolecule is much closer to the rodlike one. |
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