Bensabeh, Nabil, et al. Molecules 25.23 (2020): 5740.
Lactic acid, a key biobased chemical building block, is widely available from sugars through fermentation and can be easily converted into various important chemical intermediates and polymers. In this study, well-defined rubbery polymers derived from butyl lactate (BuLA) were successfully prepared using reversible addition-fragmentation chain transfer (RAFT) polymerization of the corresponding acrylic derivative monomer.
Synthesis of BuLA Monomer
To synthesize the BuLA monomer, butyl lactate (20.0 g, 0.14 mol) and anhydrous triethylamine (21.4 g, 0.21 mol) were dissolved in dry 2-methyltetrahydrofuran (Me-THF; 50 mL) under a continuous flow of argon. After stirring the solution for 30 minutes at 0-5°C, acryloyl chloride (14.8 g, 0.16 mol) dissolved in dry Me-THF (50 mL) was added dropwise. The reaction mixture was allowed to proceed for 24 hours at room temperature. Following this, the mixture was filtered, and Me-THF was removed under reduced pressure. The resulting residue was dissolved in 150 mL of diethyl ether and washed successively with 1M HCl (150 mL) and a saturated NaHCO3 solution (150 mL). The organic layer was rinsed with brine and dried over anhydrous MgSO4. The final residue was purified by vacuum distillation in the presence of 5% (w/w) hydroquinone, yielding BuLA (20.5 g, 75%) as a colorless liquid.
General Procedure for RAFT Polymerization of BuLA Monomer
For the RAFT polymerization, AIBN (2.07 mg, 0.01 mmol), 3,5-bis(2-dodecylthiocarbonothioylthio-1-oxopropoxy)benzoic acid (BTCBA) (or DTPA) (103.3 mg, 0.13 mmol), and BuLA (10.0 g, 50.40 mmol) were mixed in a 25 mL Schlenk tube equipped with a Teflon stirring bar. The reaction mixture was degassed by bubbling argon for 30 minutes, then submerged into a preheated, stirring oil bath maintained at 70°C. Monomer conversion was monitored by purging the side arm of the tube with argon before opening it to remove two drops of the sample using an airtight syringe. The samples were quenched by immediately placing them into liquid nitrogen exposed to air.
Niu, Ruiting, et al. Microchemical Journal 189 (2023): 108537.
Several novel in situ deep eutectic solvents (DESs) were developed using two low-toxicity phenols, thymol and p-cresol, as hydrogen bond donors (HBDs), and three biodegradable esters-3-hydroxyhexanoate, butyl lactate, and methyl salicylate-as hydrogen bond acceptors (HBAs). These DESs were formed at room temperature through an in situ process. Building on the formation of these DESs, a dispersive liquid-liquid microextraction (DLLME) method was established to efficiently extract four phthalate esters (PAEs) from water and beverage samples, followed by analysis using gas chromatography-flame ionization detection (GC-FID).
DLLME Procedure
To extract the PAEs, 10 mL of an aqueous solution containing a known concentration of PAEs, with the pH adjusted to 10, was transferred into a 15 mL centrifuge tube. Then, 0.2 g of p-cresol was added and dissolved by vortexing for 50 seconds. Following this, 20 μL of butyl lactate was introduced into the mixture, resulting in a cloudy solution as the formed DES dispersed into numerous tiny droplets. The mixture was vortexed for 1 minute and sonicated for 8 minutes to further promote the DES formation and enhance the mass transfer of the analytes from the aqueous phase to the DES phase. This step completed the extraction of the PAEs. The DES phase was collected by centrifugation at 10,000 rpm for 8 minutes, and the upper liquid phase was discarded. Finally, 1 μL of the DES phase containing the target PAEs was injected into the GC-FID system for analysis.
What is the product name of CAS number 138-22-7?
The product name is Butyl lactate.
What is the molecular weight of Butyl lactate?
The molecular weight of Butyl lactate is 146.18.
What is another name for Butyl lactate?
Butyl lactate is also known as Lactic acid butyl ester.
What is the IUPAC name for Butyl lactate?
The IUPAC Name for Butyl lactate is Butyl 2-hydroxypropanoate.
What is the boiling point of Butyl lactate?
The boiling point of Butyl lactate is 185-187 °C.
What is the melting point of Butyl lactate?
The melting point of Butyl lactate is -28 °C.
What is the flash point of Butyl lactate?
The flash point of Butyl lactate is 157 °F.
What is the density of Butyl lactate?
The density of Butyl lactate is 0.984 g/mL at 25 °C.
What is the appearance of Butyl lactate?
Butyl lactate appears as a clear colorless liquid with a mild odor.
What are some typical applications of Butyl lactate?
Butyl lactate is used as a solvent, and it is commonly used in plastics, resins, perfumes, and dyes.
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