CLOUD-POINT CURVES OF POLYMER-SOLUTIONS FROM THERMOOPTIC MEASUREMENTS
CLOUD-POINT CURVES OF POLYMER-SOLUTIONS FROM THERMOOPTIC MEASUREMENTS
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DOI：
10.1021/ma00015a024
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发表时间：
1991-07-22
期刊：
影响因子：
5.5
通讯作者：
PRAUSNITZ, JM
中科院分区：
文献类型：
--
作者：
BAE, YC;LAMBERT, SM;PRAUSNITZ, JM
Thermooptical analysis (TOA) provides a simple, rapid, and reliable experimental method to determine cloud-point curves of binary polymer/solvent systems. Phase diagrams have been obtained for different molecular weights of polystyrene in cyclohexane, methylacetate, ethylacetate, and tert-butylacetate and for poly(ethylene glycol) in water. Polystyrene solutions exhibit both upper and lower critical solution temperatures, while aqueous poly(ethylene glycol) solutions give closed-loop phase diagrams. The TOA apparatus described here uses very small samples (0.02 cm3); for a binary system, upper and lower cloud-point curves can easily be obtained in approximately 8 h.
