Vinylidine fluoride polymers

Viton. A trademark of the E.I. duPont de Nemours Co for a series of fluorelastomers based on the co-polymer of vinylidine fluoride and hexafluoropropylene with a repeating structure of [-CF2-CH2-CF2-CF(CF3H white, transparent solid sp grav 1.72—1.86. Resistant to corrosive liqs and chemicals up to 600°F, and useful in continuous service at 400—500°F. The material is resistant to weather, ozone, flame, oils, fuels, lubricants and many solvents According to Refs 2 3, Viton-A is used in many expl formulations developed by the Lawrence Livermore Laboratory, such as LX-04, LX-07, LX-10-0, LX-10-1 and LX-11-0 (see Vol... 

Estane 5702-Fl Viton A BDNPA-F Polyurethane solution system Vinylidine fluoride/hexafluoropropylene copolymer, 60/40 wt % Bis(2,2-dinitropropyl)acetal/bis(2,2-dinitropropyl) formal, 50/50 wt % Tris- -chlorethylphosphate Chlorotrifluoroethylene/vinylidine fluoride copolymer, 3 1 Vinyl chloride/chlorotrifluoroethylene copolymer, 1.5 1 Styrene polymer, 100% Di(2-ethylhexyl)phthalate Bis(2-fluoro-2,2-dinitroethyl)foimal... 

The field of molecular electronics may be considered to encompass much more than molecular electronic devices. In its broadest context, molecular electronics may be regarded as simply the application of molecules, primarily organic molecules, to electronics. This definition would include such areas as liquid crystalline materials, piezoelectric materials such as poly(vinylidine fluoride), chemically sensitive field-eflFect transistors (CHEMFET), and the whole range of electroactive polymers. These applications are beyond the scope of this book and are covered in other reviews 34, 33). However, given the basic tenet of molecular electronics, namely, the ability to engineer and assemble molecular structures into a useful device, the broader definition raises the question of whether organic molecules can be specifically assembled or engineered for unique applications in electronics. 

VINYLIDINE FLUORIDE (75-38-7) Flammable gas (flash point <-85°F/ < —65°C). Violent reaction with oxidizers, barium, sodium, or potassium. Reacts with aluminum chloride. Incompatible with hydrogen chloride. May form explosive compounds with light metals and metallic azides. Capable of forming unstable peroxides may cause explosive polymerization. Undergoes thermal decomposition when exposed to flame or red-hot surfaces. May accumulate static electricity, and cause ignition of its vapors. The uninhibited monomer vapor may block vents and confined spaces by forming a solid polymer material. 

The volume of commercial fluorine containing polymers is not large when compared with other polymers, such as poly(vinyl chloride). Fluoropolymers, however, are required in many important applications. The main monomers are tetrafluoroethylene, trifluorochloroethylene, vinyl fluoride, vinylidine fluoride, and hexafluoropropylene. 

R.K. Layek, S. Samanta, D.P. Chatterjee, and A.K. Nandi, Physical and mechanical properties of poly(methyl methacrylate) -functionalized gra-phene/poly(vinylidine fluoride) nano composites Piezoelectric p polymorph formation. Polymer, 51 (24), 5846-5856, 2010. 

Unlike polytetrafluoroethylene, polyvinyl fluoride, poly(vinylidine fluoride), and polytrifluor-oethylene yield primarily on heating HF [457]. Among these three, poly(vinylidine fluoride) yields larger amounts of HF than do the other two polymers with an accompanying formation of double bonds. 

Coleman et suggest that poly(vinylidine fluoride)-poly(methyl methacrylate) offers one of the most interesting polymer pairs in view of the highly crystallizable nature of the first component and consequent occurrence of specific interactions (complex formation). Naito et on the other hand, have inferred that the system poly(methyl methacrylamide)-copoly(styrene-acrylonitrile) exhibits almost regular solution behaviour, which should make it interesting from a theoretical point of view. 

VINYL-dl-HOMOCYSTEINE see VLU200 VINYUDENE CHLORIDE see VPKOOO VINYLIDENE CHLORIDE (II) see VPKOOO VINYUDENE DICHLORIDE see VPKOOO VINYUDENE DIFLUORIDE see VPPOOO VINYUDENE FLUORIDE see VPPOOO VINYLIDINE CHLORIDE see VPKOOO 1-VINYLIMIDAZOLE HOMOPOLYMER see VPPlOO N-VINYUMIDAZOLE HOMOPOLYMER see VPPlOO N-VINYUMIDAZOLE POLYMER see VPPlOO... 

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