Y. Takahashi et al., DETERMINATION OF EVAPORATION RATE AND VAPOR-PRESSURE OF ORGANIC MONOMERS USED FOR VAPOR-DEPOSITION POLYMERIZATION, JPN J A P 2, 32(6B), 1993, pp. 875-878
Thermogravimetry (TG) and the Langmuir equation have been employed for
the determination of the temperature dependence of the evaporation ra
te and saturated pressure of monomers used in vapor deposition polymer
ization (VDP). The measuring process utilizes the evaporation of monom
ers in vacuum. The ranges of the evaporation rate and saturated pressu
re of monomers as determined by the TG technique are from 10(-2) to 10
(-5) mol/M2.s and from 1 to 10(-3) Pa, respectively. Comparison of the
evaporation rate vs temperature relation and the melting point of mon
omers determines whether the evaporation involves sublimation from a s
olid surface or evaporation from a liquid surface.