Polyvinyl fluoride thermal stability

Polyvinylidene fluoride (PVDF) is considerably less thermally stable than PTFE but much more stable than polyvinyl fluoride (PVF) or polychlorotrifluoroethylene (PCTFE). Certain inorganic compounds (silica, titanium dioxide, and antimony oxide) can catalyze its decomposition at temperatures above 375°C (707°F) [10], ETFE degradation is autocatalytic and similar to that of PVDF and is accompanied by the evolution of hydrogen fluoride (HF). Iron and transition metal salts can accelerate the degradation of ETFE by dehydrofluorination and oligomer formation [10], Copper salts have been found to stabilize the polymer [11], ETFE decomposes rapidly at temperatures above 380°C (716°F) [11],... 

Polyvinyl fluoride can be thermally stabilized with mixtures of phenyl phosphites (e.g., triphenyl phosphite) and low molecular weight epoxy resins. Other methods include the addition of the dolomite series and the zinc salt of an organic acid l or a dialkyltin bis 3> -sulfolanylmercaptide). PO... 

The incomplete substitution of hydrogen atoms, as exemplified by polyvinylidene fluoride (T = 445 °C) as well as the presence of chlorine atoms as in polytrifluorochloroethylene (T = 413 °C) reduces their thermal stability Polyvinyl fluoride (T = 389 °C) proves to be the least thermally stable [21], even less so than polyethylene. 

S Polyvinyl fluoride (PVF). Polyvinyl fluoride (PVF) is a crystalline polymer available in film form and used as a lamination on plywood and other panels. The film is impermeable to many gases. PVF is structurally similar to polyvinyl chloride (PVC) except for the replacement of a chlorine atom with a fluorine atom. PVF exhibits low moisture absorption, good weatherability, and good thermal stability. Similar to PVC, PVF... 

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