The resulting polymer was purified in hexane to remove residual solvent, dissolved in methylene chloride, and filtered to remove the enzyme catalyst.
As an attempt toward the materialization of these unique supramolecular polymers, a selected sample was dissolved in methylene dichloride and electrospun into micro-sized particles.
In the present work, short fibers of biodegradable poly l-lactic acid) (poly l-lacticccessfully prepacid by the droPLLAe addition of PLLA dissolved in methylene chloride to a poly(vinyl alcohol) (PVA) solution containing sodium tripolyphosphate were successfully
Briefly, PLA and Av were dissolved in methylene chloride as the oil phase.
Four grams (4 g) of the crude hexane extract (oil) was dissolved in methylene chloride and impregnated with 4.0 g of Celite then concentrated to dryness over a rotary evaporator.
Briefly, 1.5 mL organic polymer solution (40 mg of PLA PEG dissolved in methylene chloride) was dropped into 25 mL EtOH at 8 mL/h (KdScientific U.S.A) under moderate stirring, leading to the immediate polymer precipitation.
The artificial ageing process was performed by exposing specimens on glass of Venice turpentine, previously dissolved in methylene chloride, to the action of UV radiation for 22 days and then leaving the resin to ultimate the ageing process for 18 years in the dark [40 43].
For acrylation, the condensation product was dissolved in methylene chloride (1∶10, ThermoFisher Scientific) containing triethylamine (TEA, equimolar to acryloyl chloride) and 500 ppm 4-methoxyphenol (MeHQ) and 15% acryloyl chloride (1∶10 v/v in methylene chloride), which was slowly dripped into the solution.
The membrane was then dissolved in methylene chloride for 10 min to completely release the microtubes.
To obtain pure PEGDA10k, the crude product was dissolved in methylene chloride and precipitated in cold diethyl ether.
