{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T10:49:38Z","timestamp":1760266178649},"reference-count":24,"publisher":"AIP Publishing","issue":"2","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[1992,2,1]]},"abstract":"<jats:p>New equipment designed to measure the effect of pressure and isotopic substitution on liquid\/liquid equilibria in polymer\/solvent systems is described. The phase separation is detected by monitoring low-angle forward scattered light, together with simultaneous loss in transmitted light, from an He\u2013Ne laser shining through the sample. Phase transitions can be induced by varying temperature\/time and\/or pressure\/time profiles or by a combination of such changes. The system operates at high precision (\u00b10.001 K, \u00b10.002 MPa), and over wide temperature and pressure ranges (240\u2264T\/K\u2264600, 0.01\u2264P\/Mpa\u226435). The temperature, pressure, and transmitted and scattered light intensities are digitally recorded, and the rate of change of the temperature and\/or pressure used to induce the phase transition is under computer control. The system is being used to study the temperature, pressure, polymer molecular weight, and molecular weight distribution, and H\/D dependences of phase equilibria for polystyrene (PS)\/(CH3)2CO and PS\/(CD3)2CO solutions. Sample results are reported. The pressure and molecular weight dependences of the coexistence curve, and their isotope effects, are large. \u2009<\/jats:p>","DOI":"10.1063\/1.1143329","type":"journal-article","created":{"date-parts":[[2002,7,26]],"date-time":"2002-07-26T13:57:30Z","timestamp":1027691850000},"page":"1717-1725","update-policy":"http:\/\/dx.doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":47,"title":["A new apparatus for the detection of phase equilibria in polymer solvent systems by light scattering"],"prefix":"10.1063","volume":"63","author":[{"given":"Jerzy","family":"Szydlowski","sequence":"first","affiliation":[{"name":"Chemistry Department, University of Tennessee, Knoxville, Tennessee 37996-1600"}]},{"given":"Luis P.","family":"Rebelo","sequence":"additional","affiliation":[{"name":"Chemistry Department, University of Tennessee, Knoxville, Tennessee 37996-1600"}]},{"given":"W. 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