VECTRA liquid-crystal polymers

Vectra Liquid Crystal Polymer Hoechst Celanese... [Pg.324]

Polymers are nsed in fnel cells. Those of particular interest are the polymer electrolyte membrane (PEM) and the phosphoric acid fuel cell (PAFC) designs. The latter design contains the liquid phosphoric acid in a Teflon bonded silicon carbide matrix. In March 2005 Ticona reported that it had bnilt the first fnel cell prototype made solely with engineering thermoplastics. They claimed that this approach rednced the cost of the fuel by at least 50% when compared with fuel cells fabricated from other materials. The 17-cell unit contains injection moulded bipolar plates of Vectra liquid crystal polymer and end plates of Fortron polyphenylene sulfide (PPS). These two materials remain dimensionally stable at temperatures up to 200 "C. The Vectra LCP bipolar plates contain 85% powdered carbon and are made in a cycle time of 30 seconds. [Pg.7]

Vectra. Liquid crystal polymer. Hoechst Celanese Corp. ViBRATHANE. PUR elastomer resin. UniRoyal, Inc. [Pg.928]

A series of Vectra liquid crystal polymer. Q series of Vectra liquid crystal polymer. [Pg.266]

Unreinforced grade of Vectra liquid crystal polymer. [Pg.266]

Ticona Vectra Liquid Crystal Polymer (LCP) Product Information, Ticona, Snmmit, NJ, 07901 (2000). [Pg.34]

Chemical Resistance of LGPs. Ceitain liquid crystal polymers (eg, Vectra) have extremely high chemical resistance to a variety of aggressive chemicals and solvents. Table 18 shows the chemical stabiUty of Vectra test-bars to various agents (244). [Pg.308]

Yet another recent development has been the alloying of polycarbonates with liquid crystal polymers such as Vectra (see Section 25.8.1). These alloys are notable for their very good flow properties and higher strength and rigidity than conventional bisphenol A polycarbonates. [Pg.579]

Injection molded thermoplastic bipolar plates made of Vectra LCP (liquid crystal polymer) and Fortron PPS fabricated by Ticona Engineering Polymers, (http //www.ticona.com/redesign/ index/markets/innovation/fuel cell.htm Ticona Engineering Polymers. 2008 accessed March 2008.)... [Pg.322]

Vectra Celanese, Hoechst Liquid crystal polymers... [Pg.809]

Both conventional and liquid-crystal polymers can be processed by melt spinning. The principal requirement is that the polymer must not degrade before becoming molten. Examples are nylon-6, nylon-6,6 and poly(ethylene terephthalate) ( polyester , terylene , or dacron ) for conventional polymers and the Vectra series (see section 12.4.3) among the thermotropic liquid-crystal polymers. [Pg.296]

Liquid crystal polymer (LCP) Vectra Ultrax Xydar 280 ... [Pg.55]

Vectra A Liquid crystal polymer, LCP reinforced or not a copolyester from hydroxy benzoic acid with hydroxynaphthoic acid Hoechst Celanese Corp. [Pg.2348]

Liquid crystal polymers based on these techniques include Victrex (ICI), Vectra (Hoescht Celanese), and Xydar (Amoco). Xydar is based... [Pg.40]

The PATs used were Torlon 4000Tf-40 (PAI-1) and Torlon 4203L (PAI-2) supplied by Amoco Performance Products. The thermotropic liquid crystal polymer (LCP) used was Vectra A950, which is a random copolyester delivered fi om HBA-HNA (Hoechst Celanese). The PAl-1 was in fine powder form with no additives while the PAI-2 was in pellet containing 0.5% PTFE and 3% TiOj. [Pg.144]

Use of Vectra A950 liquid crystal polymer is described with reference to the production of barrier packaging for the containment of anaesthetic emulsions. The pouches were compression moulded and sealed by thermal impulse welding. Concentrations of lidocaine and prolocaine in the emulsion were studied for 14 weeks at two different temperatures, 40 degrees C and 60 degrees C, and at 100% relative humidity. Loss of substances from the emulsion was due mainly to adsorption onto the polar surface of the liquid crystalline polymer, it is reported. 21 refs. [Pg.85]

As consumer products become smaller and offer more services to the user, one frequent consequence is that they contain increasing numbers of physically smaller components. A typical example of this trend is the hearing aid where the emphasis is on providing a more powerful and efficient device which will improve the wearer s quality of life. The Acuris P hearing aid from Siemens incorporates a moulded interconnect device (MID) made from Ticona s Vectra E820i LDS liquid crystal polymer (TCP). This novel plastic permits complex, fine-line circuit patterns to be laser-etched and then plated. The MID itself, whose function is to connect the microphone module to other electronic components in the unit, is approximately 3 mm wide and 25 mm long. [Pg.70]

Fig. 19.1 The plastics pyramid according to thermal literature data of common polymers preferred materials for HT-PEM applications are in the upper right region TPI thermoplastic polyimide, PES polyether sulfone, P P)SU poly(phenylene)sulfone, PE E)K polyether(ether) ketone, LCP liquid crystal polymer, e.g., Vectra, PPS polyphenylene sulfide, PTEE polytetrafluoroethylene.

Commercially available liquid crystal polymers (LCPs) (e.g., Vectra and Kevlar) exhibit excellent chemical resistance, low flammability, high elastic modulus, and low expansivity (depending on the mainchain orientation... [Pg.353]

Thermotropic aromatic copolyesters (liquid crystal polymers) (LCP) Vectra Xydar Zenite Ticona Solvay Dupont High temperature fabricated parts, E/E interconnects, connectors, medical equipment, aerospace, automotive and industrial parts... [Pg.509]

A typical semi rigid liquid crystal polymer which includes more than one mesogenic units are (a) Xydar which consists a copolyesters of 4, 4 -dihydroxybiphenol (BP), Phthalic acid (TA), and Hydroxy benzoic acid (HB A), (b) Vectra A950, a copolyesters of HBA and 2-Hydroxy-6-napthoic acid (HNA). Vectra B-950 is the only commercially available thermotropic LCPs containing amide linkages on the polymer main-chains. [Pg.109]

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