Polyvinylidine Fluoride PVDF

Polyvinylidene fluoride, is a fluorinated semi-crystalline thermoplastic which has a continuous use service temperature of up to 150 °C and a very low dielectric constant. Current manufacturers include Arkema which has become legally separated from its former owner. Total. PVDF applications include its use as fuel cell membrane material, film material in capacitors and as electrolyte material in sodium sulfur batteries. In the US, NASA has employed a crosslinked polystyrene sulfonic acid (PSSA)/PVDF composite as a PEM. 

Styrene/acrylonitrile copolymer has the properties of clarity and toughness. It is a stiff resin with good chemical resistance, high heat resistance and good dimensional stability having excellent processability and good surface finish. SAN is used in electrical components and suppliers include Bayer (Lustran), Dow (Tyril) and Polimeri Europa (Kostil). SAN can also be blended with other resins including ABS, PA and PC. 

---

The materials used in nonwoven fabrics include a single polyolefin, or a combination of polyolefins, such as polyethylene (PE), polypropylene (PP), polyamide (PA), poly(tetrafluoroethylene) (PTFE), polyvinylidine fluoride (PVdF), and poly(vinyl chloride) (PVC). Nonwoven fabrics have not, however, been able to compete with microporous films in lithium-ion cells. This is most probably because of the inadequate pore structure and difficulty in making thin (<25 /rm) nonwoven fabrics with acceptable physical properties. 

Nonabsorbable sutures are divided into natural fibers (silk, cotton, linen), and man-made fibers. The latter include polypropylene, polyanfide, polyester, poly(ether ester), polytetrafluoroethylene (Gore-Tex ), polyvinylidine fluoride (PVDF), and stainless steel. Monofilament Dyloc (from Dynek, Australia) is unusual among synthetic nonabsorbable sutures because it is made from a nonconventional man-made fiber poly(ether ester) (Fig. 10.2). The main types of material for both absorbable and nonabsorbable sutures are discussed in Chapter 11. 

Among the electroactive polymers, electronically conducting polymers such as polypyrrole and polythiophene and piezoelectric polymers such as polyvinylidine fluoride (PVDF) are the most promising with regard to tissue engineering applications. 

Polyvinylidine Fluoride (PVDF) membranes. We have had good success with Pro Blott (Applied Biosystems) (see Note 2). 

PVDF polyvinylidine fluoride ETPU engineering thermoplastic polyurethane POP poly(oxyethylene glycol) polymer FPVC flexible polyvinylchloride Conv. conventional ... 

---