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Minimum Film Forming Temperature Bar (RHOPOINT INSTRUMENT-MFFTB)

The "minimum film forming temperature" has been described as "the minimum temperature at which a water-borne synthetic latex or emulsion will coalesce when laid on a substrate as a thin film. When this process occurs, in the absence of pigmentation or other opacifying materials, a clear transparent film is formed. At lower temperatures than the minimum, a white, powdery, cracked film will result’’.

The minimum film forming temperature is usually closely related to the glass transition temperature (Tg) but not synonymous with it; whilst the Tg may be determined by predicted calculation, the minimum film forming temperature is best determined by the use of a MFFT Bar, the basic principles of which are described in ASTM D2354.



Laboratoire MAPIEM (EA 4323) - http://mapiem.univ-tln.fr/Minimum-Film-Forming-Temperature-Bar-RHOPOINT-INSTRUMENT-MFFTB.html - mapiem@univ-tln.fr