VF2


Also found in: Acronyms.

VF2

Abbreviation for:
ventricular fibrillation type 2 (see there)
References in periodicals archive ?
The acquisition includes the PVDF manufacturing facilities located in Decatur, AL, and the remaining 50% interest in Alventia LLC, a joint venture between Solvay Fluoropolymers and Dyneon that produces VF2, the principal building block of PVDF.
This decrease is mostly explained by inventory reductions resulting from the 81-day refurbishment of the VF2 float at Monterrey during the quarter, as well as increases in energy costs YoY and lower margins as a result of outsourced products.
VF2 based fluorocarbon elastomers are mainly copolymers of VF2 with hexafluoropropylene (HFP) and in a smaller volume, terpolymers of VF2, HFP and tetrafluoroethylene (TFE).
As an example, in table 2 the results are shown for a FTPE in which the elastomeric segment is a VF2/PMVE/TFE terpolymer and the plastomeric segment is a VF2 homopolymer with a melting point of 160-170 [degrees] C.
SF-105 (figure 4) is particularly aggressive on the FKM sample; this would be the result of the nucleophilic stabilizers dehydrofluorinating VF2 sites with subsequent polymer cleavage.
The VF2 plant in Decatur will have an annual capacity of more than 5,000 tons and come on stream by mid-1999.
The most common vinylidene fluoride (VF2) based fluorocarbon elastomers are copolymers of VF2 with hexafluoropropylene (HFP) and terpolymers of VF2, HFP and tetrafluoroethylene (TFE) as the third monomer.
These sites consist of VF2 unit flanked by HFP and/or TFE units.
From this consideration, it appears that VF2 fluorocarbon elastomers suffer on contact with strong bases.
6 and 7) peroxide curable VF2 based fluorocarbon elastomers show a better resistance against basic oils.
An obvious solution to this problem is to eliminate the VF2 from the monomer composition as in the case of perfluoroelastomers of TFE, perfluoroalkylvinylethers (PAVE) (ref.
10) containing VF2 show improved resistance to nucleophiles.