Mechanical and Thermophysical Properties of Polyme

ISBN 10: 0412609002 / ISBN 13: 9780412609008

Published by Springer, 1998

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Synopsis:

may never overcome the effects of hysteresis and stress (see Chapters 6 and 12). The first sentence of the reference work, Handbook of Liquid Crystals, reads: The terms liquid crystals, crystalline liquid, mesophase, and mesomorphous state are used synonymously to describe a state of aggregation that exhibits a molecular order in a size range similar to that of a crystal but acts more or less as a viscous liquid: [2] In other words, molecules within a liquid crystalline phase possess some orientational order and lack positional order; furthermore, the shape of a liquid crystalline sample is determined by the vessel in which it is contained rather than by the orientational order of its aggregated molecules. The authors recognized the limitations and imprecision of this definition but, like others preceding them, could not devise a simple and generally applicable one that is better. Regardless, the terms 'liquid crystal' and 'mesophase' should not be used interchangeably. As mentioned above, all liquid crystals are mesophases, but all mesophases are not liquid crystals. Recent studies, employing elaborate and sophisticated analytical techniques, have permitted finer distinctions between classical crystals and mesophases. At the same time, they have made definitions like that from the Handbook of Liquid Crystals somewhat obsolete for reasons other than terminology. One part of the problem arises from the use of a combination of bulk properties (like flow) and microscopic properties (like molecular ordering) within the same definition.

Synopsis: As compared to engineering polymers (EPs) and polymer composites, polymer liquid crystals (PLCs) have many attractive properties. Moreover, ordinary equipment for thermoplastic processing can be used for PLCs; often PLCs have lower viscosities than EPs, or addition of a PLC to an EP lowers the viscosity of the latter by two orders of magnitude. This book covers inorganic, organic as well as non-covalently bonded PLCs. It describes their mechanical properties and performance, thermophysical characteristics, which is the basis for intelligent processing, and also relations between properties of blends and of individual components. A chapter on computer simulations, explaining how computer modeling is being used to develop stronger polymer-based composites, is included. This book will prove an invaluable reference to all those working with polymer liquid crystals and advanced materials.

Bibliographic Details

Title: Mechanical and Thermophysical Properties of ...
Publisher: Springer
Publication Date: 1998
Binding: Hardcover
Condition: Brand New