Volume changes of castor oil during its transformation to the high pressure phase |
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| Authors: | R Wiśniewski J Jerzejewski R M Siegoczyński A Tkacz |
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| Institution: | 1. Institute of Physics, Warsaw University of Technology , Koszykowa street 75, 00-662, Warsaw, Poland;2. Institute of Physical Chemistry, Polish Academy of Science , Kasprzaka street 44, 01-224, Warsaw, Poland |
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| Abstract: | Abstract Time dependencies p(t)V,T, nd V(t),P,T, at room temperature as castor oil phase transition indicators were investigated. The time after which the transition takes place, within the pressure range from 0.36 up to 1.05 GPa, strongly depends on pressure. Its minimum, at about 0.6 GPa is equal to 15 hours. Under the same conditions of experiment the largest change in volume (about ?2%) was detected. The relative changes of volume on pressure for the normal state of castor oil and for its new high pressure state have been found to be approximately the same. A large hysteresis of volume changes after the phase transition has also been observed. |
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| Keywords: | Pressure-induced phase transition compressibility castor oil |
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