کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
202268 460596 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermoresponsive phase behavior of poly(2-chloroethyl vinyl ether-alt-maleic anhydride) solutions in propyl acetate/n-alkane mixed solvents
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Thermoresponsive phase behavior of poly(2-chloroethyl vinyl ether-alt-maleic anhydride) solutions in propyl acetate/n-alkane mixed solvents
چکیده انگلیسی

Thermoresponsive phase behavior of poly(2-chloroethyl vinyl ether-alt-maleic anhydride) (P(CVE-MA)) in mixed solvent of propyl acetate (PrAc) and n-alkane has been investigated. At a proper solvent composition of PrAc/n-octane, the polymer solution was transparent at lower temperature, and became turbid with heating, which suggest that this polymer solution exhibits lower critical solution temperature (LCST) type phase behavior. Controllability of the cloud point of the polymer solution was studied by light scattering technique. At the fixed polymer concentration of 1 mass%, the cloud point value changed from 76 °C to 31 °C with increasing the n-octane content from 6 to 16 mass% in the mixed solvent, with excellent linear relationship. The cloud point curve plotted against polymer concentration shifted to higher temperature with decreasing molecular weight of P(CVE-MA). The cloud point curve also shifted to higher temperature when the chain length of the added n-alkane became longer, and this result was explained by n-alkane's polarity and molecular size.


► Novel phase behavior of poly(2-chloroethyl vinyl ether-alt-maleic anhydride) (P(CVE-MA))in organic media was investigated.
► P(CVE-MA) exhibited LCST-type phase behavior in mixed solvents of propyl acetate/n-alkane at mild condition.
► Cloud point of the solution can be tuned conveniently.
► Effects of the added n-alkane and molecular weight of P(CVE-MA) on the LCST behavior were investigated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Phase Equilibria - Volume 315, 15 February 2012, Pages 29–34
نویسندگان
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