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Showing 1 to 20 of 214 for “"liquid crystalline"”.
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New Liquid Crystalline [2]Rotaxanes
… synthesis and characterization of a range of new liquid crystalline interlocked molecules and to study structure-property relationships between rotaxane design and mesomorphism. Chapter 1 introduces concepts of supramolecular chemistry and liquid crystals and cooperative effect between [2]rotaxane …
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Molecular simulation of liquid crystalline
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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Liquid crystalline multi-block copolymers
Lyotropic and thermotropic high strength liquid crystalline polymers have become an important area of research and development in polymeric, high performance materials. These materials have afforded excellent high temperature stability and high strength in the oriented direction, but not in the …
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Epoxy + Liquid Crystalline Epoxy Coreacted Networks
… reinforcement through in-situ polymerization of liquid crystalline epoxies (LCEs) and a non-liquid crystalline epoxy has been investigated. Three LCEs: diglycidyl ether of 4,4'-dihydroxybiphenol (DGE-DHBP) and digylcidyl ether of 4-hydroxyphenyl-4"-hydroxybiphenyl-4'-carboxylate (DGE-HHC), were …
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Liquid crystalline semiconductors for organic electronics
… based on the synthesis and evaluation of novel liquid crystalline materials with light-emitting and or charge-transporting properties. Some of the liquid crystals (LCs) synthesised incorporate photopolymerisable diene or methacrylate end groups, situated at the peripheries of the molecular core. …
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Constitutional isomerism in liquid crystalline polyamides
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1988.
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Reclamation and Reprocessing of Thermotropic Liquid Crystalline Polymer from Composites of Polypropylene Reinforced with Liquid Crystalline Polymer
… considerable interest in the use of thermotropic liquid crystalline polymers (TLCPs) to reinforce thermoplastic materials. In a novel process developed by Baird and coworkers, wholly thermoplastic composites are produced via a patented, dual extrusion process. This unique process yields a fiber …
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Theranostic applications of fluorescent liquid crystalline nanoparticles
Lipid liquid crystalline nanoparticles can find application as nanocarriers in several fields of the daily life but, very likely, the pharmaceutical arena is the most relevant. Indeed, several problems encountered in drugs administration (e.g. critical sideeffects from antitumor drugs) require …
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Cellulose-based fibers from liquid crystalline solutions
… substituents were studied in relation to their liquid crystalline (LC) solution behavior. Classical LC behavior was revealed for all solutions. Critical polymer concentration (V<sub>p</sub><sup>c</sup>) is highest for cellulose acetate (CA) and lowest for cellulose acetate butyrate (CAB) with …
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Orientation and Dynamics of Nanoscale Liquid Crystalline Films
The behavior of nanoconfined liquid crystalline thin films on the order of 40 to 300 nm in thickness has been investigated. An infrared-transparent cell of unique design was constructed using microfabrication techniques. The cell is comprised of ZnSe substrates and a gold interdigitated array …
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Photoresolvable compounds: Towards a chiroptical-liquid crystalline switch
… compounds in the creation of a chiroptical liquid crystalline switch are discussed.
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Fiber spinning and rheology of liquid-crystalline polymers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1994.
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Order in side-chain liquid crystalline diblock copolymers
The architecture of side-chain liquid crystalline diblock copolymers (SCLCBC's) involves order on two different but interdependent length scales. Through molecular-scale interactions, liquid crystalline moieties self-assemble into a variety of mesophases, and on a larger length scale, chemical …
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Effects of solvents on thermotropic liquid crystalline copolyesters
… studies were carried our on thermotropic liquid crystalline copolyesters based on poly(ethyleneterephthalate) (PET) and para hydroxybenzoate (PHB), where PHB content varied from 0 mole percent up to 80 mole percent. The technique of chemical etching coupled with SEM and WAXS was utilized …
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Computer simulation of confined and flexoelectric liquid crystalline systems.
… Thesis, systems of confined and flexoelectric liquid crystal systems have been studied using molecular computer simulations. The aim of this work was to provide a molecular model of a bistable display cell in which switching is induced through the application of directional electric field …
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Order reconstruction and solution landscapes for liquid crystalline systems
Liquid crystals are the surprisingly less well known fourth phase of matter, sitting between the familiar solid and liquid phases. These materials combine fluidity with orientational and/or positional order, yielding surprising and desirable properties relevant for use in tailor-made applications. …
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A Least Squares Closure Approximation for Liquid Crystalline Polymers
… schemes for the Doi-Hess kinetic theory of liquid crystalline polymers is provided. A new closure scheme is devised based on a least squares fit of a linear combination of the Doi, Tsuji-Rey, Hinch-Leal I, and Hinch-Leal II closure schemes. The orientation tensor and rate-of-strain tensor …
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Synthesis and properties of potentially liquid crystalline phosphorus compounds
… shaped to full] the requirements necessary for liquid crystalline phase formation. However, recent moves away from these traditional theories have led to the discovery of molecules possessing geometries such as tetrahedral and even octahedral producing mesogenic phases. One molecular geometry …
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