首页> 外文期刊>The European physical journal, E. Soft matter >Liquid filament instability due to stretch-induced phase separation in polymer solutions
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Liquid filament instability due to stretch-induced phase separation in polymer solutions

机译:由于拉伸引起的聚合物溶液相分离,液体长丝不稳定

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摘要

The instability in a jet of a viscoelastic semidilute entangled polymer solution under high stretching is discussed. Initially the jet is stable due to solution elasticity stopping the fluctuation growth. The modeling shows that a jet stretching results in a radial gradient in the polymer distribution: the polymer is concentrated in the jet centre, whereas the solvent is remaining near the surface. This viscous liquid shell demonstrates Raleigh-type instability resulting in the formation of individual droplets on the oriented filament. All process stages were observed experimentally.
机译:讨论了在高拉伸下粘弹性半稀释缠结聚合物溶液在射流中的不稳定性。最初,由于溶液弹性阻止了波动的增长,射流是稳定的。该模型表明,射流拉伸会导致聚合物分布出现径向梯度:聚合物集中在射流中心,而溶剂保留在表面附近。该粘性液体壳表现出罗利型不稳定性,导致在取向的长丝上形成单个液滴。所有过程阶段均通过实验观察。

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