Crystalline Structures and Non-crystalline States of Polymers
نویسندگان
چکیده
منابع مشابه
Rheology of liquid crystalline polymers
Concepts which may be used in interpreting the complex rheology of liquid crystalline polymers are reviewed. Some of them are taken from the nematodynamics of low molecular weight liquid crystals as described by the Leslie—Ericksen theory, others are intrinsic to the viscoelasticity of ordinary polymers. Tentatively, these concepts are used to construct an explanation of the band texture which ...
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Crystalline polymers build up complex structural entities, which blend amorphous and crystalline domains at a very small scale (≈ 10 nm). The coexistence of domains, which are of molecular, dimensions stems from the fact that the chains tend to fold upon crystallisation: this chain folding is a characteristic feature of polymers, and creates an organisational scale which is unique to polymers. ...
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In previous papers (1,2) the thermotropic properties and the kinetics of the bulk polymerization of the mesomorphic monomer cholesteryl acrylate have been described. In addition to cholesteryl acrylate, the methacrylate was prepared, as well as the respective acrylic methacrylic acid ester of cholestanol. We now wish to report the properties of these monomeric esters and the results of their po...
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Small molecule and polymeric liquid crystalline materials have applications in a multitude of areas, ranging from displays, optical/ electronic imaging, data storage, and stress/temperature sensing to chemical/fire resistance and artificial muscle actuation. The design of typical molecular architectures that facilitate thermotropic liquid crystalline behavior is well documented. Molecules with ...
متن کاملCharacterization of Semi-crystalline Polymers Using MRI
H single point magnetic resonance imaging (SPI)[1],[2],[3] has been introduced in the literature as a method for determining relaxation characteristics of semi-crystalline polymers and for extracting MRI images from such samples. The work presented in the literature to date demonstrates the applicability of this technique. In this work, SPI has been applied to the direct observation of stress-i...
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ژورنال
عنوان ژورنال: Kobunshi
سال: 1971
ISSN: 0454-1138,2185-9825
DOI: 10.1295/kobunshi.20.342