Citation: . LIQUID-LIQUID PHASE EQUILIBRIUM OF POLYMER SOLUTIONS AND POLYMER BLENDS UNDER POSITIVE AND NEGATIVE PRESSURE*[J]. Chinese Journal of Polymer Science, ;2003, 21(2): 241-249. shu

LIQUID-LIQUID PHASE EQUILIBRIUM OF POLYMER SOLUTIONS AND POLYMER BLENDS UNDER POSITIVE AND NEGATIVE PRESSURE*

Received Date: 31 August 2002

In this paper we would like to give a brief review about the extensibility of the liquid-liquid locus into the negativepressure region. Negative pressure states are hardly explored; most researchers believe that the pressure scale ends at p = 0.We would like to show that this is not true, the p = 0 point is not a special point for liquids, it can be "easily" crossed. We aregoing to give a few example, where the extension of liquid-liquid locus for polymer blends and solutions below p = 0 gives us some interesting results,like the merging of UCST and LCST branches in weakly interacting polymer solutions of the reason why most UCST blends exhibit pressure induced immiscibility.Also we will see what happens with the immiscibility island of aqueous polymer solutions when—reaching the critical molar mass—it"disappears".
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