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Construction of ternary phase diagrams in nonsolvent/solvent/PMMA systems

✍ Scribed by Juin-Yih Lai; Shun-Fu Lin; Fung-Ching Lin; Da-Ming Wang

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 193 KB
Volume: 36
Category: Article
ISSN: 0887-6266
DOI: 10.1002/(sici)1099-0488(199803)36:4<607::aid-polb7>3.0.co;2-l

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✦ Synopsis

In this work, the ternary phase diagrams in three nonsolvent/solvent/ PMMA systems ( n-hexane/ n-butyl acetate/PMMA, water/acetone/PMMA, and n-hexane/acetone/PMMA) were constructed by theoretical calculation and experimental measurement. Binodal curves were calculated by using the Flory-Huggins theory for three-component systems and measured by titrating the PMMA solution with nonsolvent until the onset of turbidity. By using concentration-dependent nonsolvent/solvent and solvent/PMMA interaction parameters and constant nonsolvent/PMMA interaction parameters, good agreement has been obtained between the calculation and the measurement. The values of nonsolvent/solvent interaction parameters were taken from the literature sources, and the values of solvent/PMMA and nonsolvent/PMMA interaction parameters were measured by vapor sorption and swelling equilibrium, respectively.

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