Solid state coagulation of rigid-rod polymer thin films

Lee, J.W.; Wang, C.S.; Price, Gary E.; Husband, D. M.

doi:10.1016/s0032-3861(96)00621-0

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…In addition to solution methods, a solid-state coagulation process was suggested to make high quality rigid-rod optical films (139). In this process, an optically isotropic rigid-rod polymer solution is rapidly frozen into a solid mixture to preserve the molecular dispersion of the polymer in the solvent, and then the polymer is coagulated at a cryogenic temperature with a proper coagulate to extract the frozen solvent without disrupting the macromolecular distribution.…”

Section: Fiber Spinning Processmentioning

confidence: 99%

Rigid‐Rod Polymers

Wang¹,

Jiang²,

Adams³

2011

Encyclopedia of Polymer Science and Technology

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Pursuing high strength and high modulus polymer fibers and novel electrooptical properties have motivated much research activity in rigid‐rod polymers in the past 40 years. In this review, we examine the synthesis, structures, and properties of rigid‐rod polymers with emphasis on polybenzobisoxazoles (PBO), polybenzobisthiazoles (PBZT) and polybenzimidazoles (PBI), beginning with their solution properties, especially lyotropic liquid crystallinity. High performance fibers spun from lyotropic liquid crystalline polyphosphoric acid (PPA) solution are described. The characterization of fiber properties including mechanical, thermal, electrical, and optical properties is summarized. PBO (Zylon) and PIPD (M5) fibers were successfully commercialized in high strength applications such as body armor, ropes, cables, and recreational equipment in the last 10 years, and we discuss the possible causes of rapid degradation of some PBO fibers. The concepts of molecular composites and nanocomposites provide new applications in antiballistic materials, fire protection, athletic equipment, cables, strings, ropes, cordage, sails, multilayer circuits, and catalyst supports. Recently, rigid‐rod polymer films have drawn attention in the electrooptical fields, especially for phosphoric acid (PA)‐doped PBI membranes (Celtec MEAs) in the applications of high temperature fuel cells. Computer simulation has been employed as a powerful tool to predict the properties of the rigid‐rod polymers.

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Section: Fiber Spinning Processmentioning

confidence: 99%

Rigid‐Rod Polymers

Wang¹,

Jiang²,

Adams³

2011

Encyclopedia of Polymer Science and Technology

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“…Polymer solutions are critical to the processing of a wide range of materials (from thin films for optical applications to paper). They are also critical to biological function as proteins are nearly always solvated in physiological conditions .…”

Section: Introductionmentioning

confidence: 99%

Interactions and Assembly of Simple Solvated Polymers Models

Frink

Salinger

2002

Langmuir

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In this paper we discusses the application of a three-dimensional implementation of a geometry-based nonlocal density functional theory to the interactions between rigid polymers in solution. Deoxyribonucleic acid (DNA) provides inspiration for the three simple model polymers (cylindrical, bead chain, and periodic) we consider; however the results are more generally applicable to rigid polymers such as liquid crystals. The calculations show that fine details of polymer surface structure play a critical role in determining the solvation energy landscape. This solvation energy landscape in turn controls routes for assembly of bundles of macromolecules. This approach provides a new level of molecular insight into interactions in solvated polymer systems with wide applications to both industrial and biological polymers.

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Rigid‐Rod Polymers

Jiang¹,

Eby²,

Adams³

2002

Encyclopedia of Polymer Science and Technology

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The synthesis, structure, properties, and applications of rigid‐rod polymers are described. PBZT and PBZO are selected as the models to be discussed in detail with respect to their fiber, film, and molecular‐composite processing, liquid‐crystal solution behavior, and computer simulations. Emphasis is placed on their ultimate tensile, thermal, chemical, electrical, and optical properties, and how to improve their compressive properties. The current and future usages of rigid‐rod polymers in various scientific, technical, and engineering areas also have been introduced. Many new rigid‐rod polymer materials, such as PPP, PPE, PPV, PTh, and other organometallic polymer systems are included.

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Solid state coagulation of rigid-rod polymer thin films

Cited by 5 publications

References 9 publications

Rigid‐Rod Polymers

Rigid‐Rod Polymers

Interactions and Assembly of Simple Solvated Polymers Models

Rigid‐Rod Polymers

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