Copolymer for use in alkene-alkane separation membranes
a technology of alkenealkane and copolymer, which is applied in the direction of membranes, separation processes, synthetic resin layered products, etc., can solve the problems of high cost, propylene boil, and difficult separation of such compounds with similar boiling points
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example 1
Synthesis of PDD / VF / SEFVE (Feed Ratio 100:100:150) Copolymer and Hydrolysis
[0039]Into a 150 mL stainless steel pressure vessel, after argon purging for 5 minutes, were added a magnetic stirring bar, 3.66 g PDD, 10.04 g SEFVE, 12 mL of Vertrel® XF, 0.6 mL of HFPO dimer peroxide solution (0.12M), and then charged 0.69 g of vinyl fluoride gas at 0° C. The reaction mixture was sealed in the pressure vessel and stirred at room temperature in a water bath. After 3 hours of reaction, the reaction vessel was opened to ambient air, 10 mL acetone and 40 mL methanol was added to the reaction mixture. The resulting gel like precipitate was transferred to a glass dish and dried in oven at 100° C. overnight to yield 5.5 g PDD / VF / SEFVE terpolymer as a colorless solid (Tg 37° C.).
[0040]Into a 250 mL round bottom flask, were added 3.75 g of the terpolymer synthesized in the previous paragraph, 20 mL deionized water, 60 mL of methanol, 1.85 g ammonium carbonate and a magnetic stirring bar. The reacti...
example 2
Synthesis of PDD / VF / SEFVE (Feed Ratio 100:200:150) Copolymer and Hydrolysis
[0041]Into a 150 mL stainless steel pressure vessel, after argon purging for 5 minutes, were added a magnetic stirring bar, 3.66 g PDD, 10.04 g SEFVE, 15 mL of Vertrel® XF, 0.6 mL of HFPO dimer peroxide solution (0.12M), and then charged 1.38 g of vinyl fluoride gas at 0° C. The reaction mixture was sealed in the pressure vessel and stirred at room temperature in a water bath. After 5.5 hours of reaction, the reaction vessel was opened to ambient air, 10 mL acetone and 40 mL methanol was added to the reaction mixture. The resulting gel like precipitate was transferred to a glass dish and dried in oven at 100° C. overnight to yield 9.1 g PDD / VF / SEFVE terpolymer as a colorless solid (Tg 18° C.). Anal: Found: C, 24.92; H, 0.55; S, 5.01. Intrinsic viscosity (in Novec® HFE-7200 at 25° C.): 0.389 dL / g. From the elemental analysis, the polymer composition was estimated as 21% PDD, 43% VF and 37% SEFVE.
[0042]Into a 2...
example 3
Synthesis of PDD / VF / PPSF (Feed Ratio 100:100:150) Copolymer and Hydrolysis
[0043]Into a 150 mL stainless steel pressure vessel, after argon purging for 5 minutes, were added a magnetic stirring bar, 3.66 g PDD, 6.3 g PPSF, 12 mL of Vertrel® XF, 0.6 mL of HFPO dimer peroxide solution (0.12M), and then charged 0.96 g of vinylidene fluoride gas at 0° C. The reaction mixture was sealed in the pressure vessel and stirred at room temperature in a water bath. After overnight reaction, the reaction vessel was opened to ambient air, 10 mL acetone and 40 mL methanol was added to the reaction mixture. The resulting gel like precipitate was transferred to a glass dish and dried in oven at 100° C. overnight to yield 6.0 g PDD / VF / PPSF terpolymer as a colorless solid (Tg 58° C.).
[0044]Into a 250 mL round bottom flask, were added 4.0 g of the terpolymer synthesized in the previous paragraph, 20 mL deionized water, 60 mL of methanol, 1.5 g ammonium carbonate and a magnetic stirring bar. The reaction ...
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