Polymers vinylidene-fluoride terpolymers

There are a number of other polymers in this family including polychlorotrifluoroethylene (PCTFE), polyvinyl fluoride (PVF), polyvinylidenefluoride, ethylene chlorotrifluoroethylene (ECTFE), tetrafluoro-ethylene/hexafluoropropylene/vinylidene fluoride terpolymers, and chlorotrifluoroethylene/vinylether copolymers. 

In addition, Maiti and Bhowmick [93] also used fluoroelastomers having different microstructure and viscosity (Viton B-50, Viton B-600, Viton A-200, and VTR-8550). Viton is a terpolymer of vinylidene fluoride (VF2), hexafluoropropylene (HFP), and tetrafluoroethylene (TFE). Even with the addition of only 4 phr of clay in Viton B-50, the tensile strength and modulus improved by 30-96% and 80-134%, respectively, depending on the nature of the nanoclays. The better polymer-filler interaction in the case of NA clay and the fluoroelastomers has... 

Daikin Industries DuPont Fluoroproducts Note PTFE, polytetrafluoroethylene CTFE, chlorotriflua oethylene EFEP, per-fluorinated copolymer of ethylene and propylene ETFE, copolymer of ethylene tetrafluoroethylene PFPE, perfluorinated polyether EClFE, copolymer of ethylene and chlorotrifluoroethylene HIE, ter-polymer of hexafluoropropylene, tetrafluoroethylene, and ethylene MFA, copolymer of perfluoromethyMnylether and tetrafluoroethylene PEA, copolymer of perfluoropropylvinylether and tetrafluoroethylene FEP, fluorinated ethylene-propylene copolymer PVDF, poly(vinylidene fluoride) THV, terpolymer of tetrafluoroethylene, hexafluoroprqjylene, and vinyUdene fluoride PCTFE, poly(chlorotriflua oethylene). 

Vinylidene Fluoride Hexafluoropropylene Tet-rafluoroethylene Terpolymer - Thermosetting elastomeric polymer of vinylidene fluoride, hexafluoropropylene, and tetrafluoroethylene having good chemical and heat resistance and flexibility. Used in auto parts. Also called TAM/ TFE. 

Application of diallyl terephthalate as an accelerator for curing fluorinated polymers such as a terpolymer of tetrafluoroethylene, vinylidene fluoride, and perfluoropropylene [123]. 

Vinylidene fluoride-hexafluoropropylene co-polymer (VF2/HFP) n. Any of a family of chemical- and heat-resistant, vulcaniz-able elastomers containing 60-85% VF2 (DuPont s Viton A). Terpolymers with small amounts of tetrafluoroethylene are also available. 

The three principal Viton categories are (1) Viton A dipolymers composed of vinylidene fluoride (VF2) and hexafluoropropylene (HFP) to produce a polymer with 66% (% wt) fluorine content, (2) Viton B ter-polymers of VFg + HFP -I- tetrafluoroethylene (TFE) to produce a polymer with 68% fluorine, and (3) Viton F terpolymers composed of VF2 + HFP + TFE to produce a polymer with 70% fluorine. The three categories are based on their resistance to fluids and chemicals. Fluid resistance generally increases but low-temperature flexibility decreases with higher fluorine content. Specialty Viton grades are made with additional or different principal monomers in order to achieve specialty performance properties. An example of a specialty property is low-temperature flexibility. 

The list of polymers known to respond satisfactorily to permanganic etching is now long and continually growing. It consists of linear and branched polyethylene, four isotactic polyolefins (polypropylene, polystyrene, poly(4-methylpentene-l) and poly(butene-l)), related atactic polymers, poly(vinylidene fluoride) (hereafter denoted PVF2), PEEK, and poly(ethylene terephthalate) (PET), together with various copolymers and others such as ethylene propylene rubbers and ethylene-propylene-diene (EPDM) terpolymer. 

In the late 1950s, the copolymers of vinylidene fluoride and hexaflu-oropropylene (CF2MDFCF3) were developed on a commercial scale by 3M (Fluorel) and by DuPont (Viton) (5-7). In the 1960s, terpolsrmers of vinylidene fluoride, hexafluoropropylene, and tetrafluoroethylene (CF2=CF2) were developed (8) and commercialized by DuPont as Viton B. At about the same time, Montedison developed copolymers of vinylidene fluoride and 1-hydropentafluoropropylene as well as terpolymers of these monomers with tetrafluoroethylene marketed as Tecnoflon polymers (9,10) (see also Perfluorinated Polymers). 

Sauguet L, Ameduri B, Boutevin B (2006) Fluorinated, crosslinkable terpolymers based on vinylidene fluoride and bearing sulfonic acid side groups for fuel-cell membranes. J Polym Sci A Polym Chem 44 4566 578... 

VITON A trademark of the DuPont Company for a rubberlike copolymer of hexafluoropropylene and vinylidene fluoride or terpolymer of hexafluoropropylene, vinylidene fluoride, and tetrafluorethene used in protective clothing. VITON belongs to the group of polymers called Fluoroelastomers. Also called FKM. 

Vinylidene Fluoride Hexafluoropropylene Tet-rafluoroethylene Terpolymer - Thermosetting elastomeric polymer of vinylidene fluoride, hexafluoropropylene, and tetrafluoroethylene having good chemical and heat resistance and flexibility. Used in auto parts. A property of a material that exhibits both elastic and viscous behavior. Viscoelastic materials have both solid-like characteristics—elasticity, strength, and stability of form—and liquid-like eharaeteristies, such as flow that depends on time, temperature, and stress. All plasties exhibit some degree of viseoelastie-ity. Also FKM/TFE viscoelasticity. 

---