A Device for Determination of Vapour Sorption in Polymers

  • O. Vopička Department of Physical Chemistry, Polymer Department, Institute of Chemical Technology, Prague
  • V. Hynek Department of Physical Chemistry, Polymer Department, Institute of Chemical Technology, Prague
  • K. Friess Department of Physical Chemistry, Polymer Department, Institute of Chemical Technology, Prague
  • M. Šípek Department of Physical Chemistry, Polymer Department, Institute of Chemical Technology, Prague
  • P. Sysel Department of Physical Chemistry, Polymer Department, Institute of Chemical Technology, Prague

Abstrakt

The principle of the device consists in measuring the mass of vapour sorbed in a sample as a function of time using the McBain spiral balance monitored by a camera system. Absolute pressure is monitored by a capacitance pressure gauge. The maximum amount of the sample is limited to 0.5 g and the mass change sensitivity threshold is 10 μg. The device makes it possible to measure sorption kinetics with good accuracy. As an example, the kinetics of sorption of p-xylene vapours by low-density polyethylene membrane was measured and the resulting sorption isotherm was determined.
Publikované
2009-05-15
Sekce
Články