By Sina Ebnesajjad
Expanded PTFE functions guide: expertise, production and Applications is a accomplished consultant to ePTFE, explaining production applied sciences, homes, and functions. applied sciences that have been formerly shrouded in secrecy are printed intimately, as are the origins and historical past of ePFTE.
The publication is an important guide for scientists and engineers operating in PTFE processing industries, and for brands operating with fluoropolymers. it's also of use to buying managers and academics.
- Presents each element of the producing applied sciences and homes of ePFTE
- Provides precise insurance of ePTFE functions in clothing, clinical, and surgical units, filtration, vents, and business uses
- Follows ePFTE from its unique discovery to the newest developments
Read or Download Expanded PTFE Applications Handbook. Technology, Manufacturing and Applications PDF
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Extra resources for Expanded PTFE Applications Handbook. Technology, Manufacturing and Applications
Example text
Fig. 8 summarizes these reactions. Fig. 9 shows that the surface tension of such a VDF-containing surfactant is similar to that of PFOA. 4 g/L), and therefore it is a replacement candidate for PFOA. Murai, Enokida, and Murata have provided another example of a surfactant that should degrade in the environment [38], as seen in Eq. 7) through Eq. 9). The starting compound is CF3CF2CF2CF2I, which can be prepared from telomerizing C2F5 and TFE. In this case the CH2 group is the susceptible point in the molecule, in addition to being the site at which chain transfer reactions commence.
The anticoagulant was a saturated hydrocarbon with more than 12 carbons, also known as wax, which is a liquid at the polymerization temperature. Brinker and Bro refer to the gases that they added (eg, ethane) as “stabilizers” because of the surprising improvement in thermal stability that their presence provided. They believed that these stabilizing agents aided in the formation of smaller colloidal particles and thus enhanced the stability of the dispersion against coagulation. They also noted that the added gases might be chain-transfer or chain-terminating agents.
Gov) to work toward the elimination of APFO emissions and its use in products by 2015. 6 A Comparison of Polytetrafluoroethylene Products and Processes [27] Granular Fine Powder Dispersion TFE, PPVE TFE (HFP, PPVE, PFBE) TFE H2O H2O H2O Regime Suspension Dispersion Dispersion Reactor Vertical Horizontal Horizontal Agitation Vigorous Mild Mild Batch Batch Batch (NH4)2S2O8 (APS) Disuccinic peroxide (DSP)/APS DSAP/ASP Monomers Media Mode Initiator Surfactant Solids, % Fluorinated carboxylic salt Fluorinated carboxylic salt Fluorinated carboxylic salt 25 45 HFP, hexafluoropropylene; PFBE, perfluorobutyl ethylene; PPVE, perfluoropropyl vinyl ether; TFE, tetrafluoroethylene.