Teflon Poly

A study has been conducted on PBXs based on TATB using various binders such as polyurethane (Estane 5703-Goodrich), Viton-A (copolymer of vinylidene fluoride and hexafluoropropylene Du Pont), silicone resin (Chemlok), Kel-F800 [copolymer (3 1) of chlorotrifluoroethylene and vinylidene fluoride 3M Company] and Teflon [poly (tetrafluoroethylene), PTFE Du Pont] etc. and it was concluded that... 

Filters can be grouped on the basis of different characteristics. For example, they can be grouped on the basis of the design capacity of the filters according to the particle concentration or loading [Svarovsky, 1981] or they can be grouped on the basis of the materials of the filters, e.g., fabric or nonfabric [Cooper and Freeman, 1982], Most filters in use are bag filters, which are fabric. The common fabric materials include cotton, polyester, wool, asbestos, glass, acrylic, polytetrafluoroethylene (Teflon), poly (m-phenylene isophthalate) (Nomex), polycaprolactam (Nylon), and polypropylene. 

Substrates used included fiber-reinforced epoxy base polymer [FRP], nylon 66, polytetrafluoroethylene [Teflon], poly(ethylene terephthalate) [PET], phenolic resin, and thermoplastic polyimide [ULTEM, GE]. FRPs were the primary substrates used. Initially, they were cleaned with detergent in an ultrasonic bath followed by rinsing with deionized water and alcohol. For further cleaning, they were treated with oxygen plasma (1.33 seem, 60 W, 5 min) followed by a hydrogen plasma treatment (3 seem, 60 W, 5 min). 

Teflon (poly(tetrafluorethylene) powder (> 40pm, Aldrich, Saint Louis, Missouri, USA). 

This report is concerned with contact angle hysteresis and with a closely related quantity referred to as "critical line force (CLF)." More particularly, it is concerned with the relationship between contact angle hysteresis and the magnitude of the contact angle itself. Two sets of liquid-solid-vapor systems have been investigated to provide the experimental data. One set consists of Teflon [poly(tetrafluoroethylene), Du Pont] and a series of liquids forming various contact angles at the Teflon-air interface. The second set consists of polyethylene and a similar series of liquids. In neither case was the ratio of air to test liquid vapor at the boundary line controlled, but it can be assumed that the ambient vapor phase operative in all the systems was close to an equilibrium mixture. 

Other examples of well-established trade names are Kevlar (poly(paraphenylene terephthalamide)), Plexy-glass (sheets of poly(methyl methacrylate)). Teflon (poly(tetrafluoroethylene)), and Dacron (PET fiber). 

The film balance (also called Langmuir trough) consists of a teflon (or teflon lined) rectangular trough (typically 20 cm x 10 cm x 1 cm). Teflon poly(tetraflouroethylene) (PTFE) allows one to keep the apparatus clean. A barrier of teflon is placed on one end of the trough, which is used as a barrier to compress the lipid molecules. Currently, there are many commercially available film balances. 

Early attempts to coat metals with Teflon, poly (tetrafluoroethylene), resulted in a polymer layer that peeled off the surface easily. Later attempts gave coatings that were much more durable. What type of adsorption processes are being manifested in either situation What technical problem had to be solved in order to develop durable coatings ... 

Others Breast implants Hernia mesch Blood bags Ear tubes Sutures Intrauterine device Silicone Sihcone, polypropylene, teflon Poly(vinyl chloride) Sihcone, teflon Polylactic acid, polydioxanone, polypropylene, stainless steel Silicone, copper... 

Polypropylene, PP Poly(ethylene terephthalate), PET Poly(tetrafluoroethylene), PTFE, Teflon Poly (vinyl chloride), PVC Polystyrene, PS... 

---