High Strength/Highly Oriented Polymers.
نویسندگان
چکیده
منابع مشابه
Continuity Laws for Oriented Polymers
Macromolecular chains are oriented in a wide range of materials. Important examples include polymer liquid crystals, grafted chains, ordered copolymers, polymer crystals, and fibers. Orientational order may occur on more than one level. For instance, in micellar systems the alkyl chains are oriented because they are densely packed, yet on a mesoscopic level semiflexible micelles themselves may ...
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Based on transfer matrix techniques and nite size scaling, we study the oriented polymer (self-avoiding walk) with nearest neighbor interaction. In the repulsive regime, various critical exponents are computed and compared with exact values predicted recently. The polymer is also found to undergo a spiral transition for suciently strong attractive interaction. The fractal dimension of the polym...
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We study directed polymers subject to a quenched random potential in d transversal dimensions. This system is closely related to the Kardar–Parisi– Zhang equation of nonlinear stochastic growth. By a careful analysis of the perturbation theory we show that physical quantities develop singular behavior for d → 4. For example, the universal finite size amplitude of the free energy at the rougheni...
متن کاملBiodirected epitaxial nanodeposition of polymers on oriented macromolecular templates.
Biodirected epitaxial nanodeposition of polymers was achieved on a template with an oriented molecular surface. Acetobacter xylinum synthesized a ribbon of cellulose I microfibrils onto a fixed, nematic ordered substrate of glucan chains with unique surface characteristics. The substrate directed the orientation of the motion due to the inverse force of the secretion during biosynthesis, and th...
متن کاملMetal-insulator transition in highly conducting oriented polymers
We suggest that highly conducting oriented polymers with a fibril structure can be modeled by a regular lattice of disordered metallic wires with a random first-neighbor interwire coupling which mimics the cross-links between fibrils. We show that such a model can be described by a non-linear sigma model. Within a one-loop self-consistent approximation, we determine the position of the metal-in...
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ژورنال
عنوان ژورنال: Kobunshi
سال: 1999
ISSN: 0454-1138,2185-9825
DOI: 10.1295/kobunshi.48.100