Ring opening polymerization of ε-caprolactone through water
Ring opening polymerization (ROP) is commonly used to synthesize biodegradable polymers such as polycaprolactone (PCL). These reactions typically demand anhydrous reagents and inert atmosphere, only attainable through the use of complex …
Synthesis and Properties of Functionalized Poly(ε-caprolactone); …
2022年3月10日 · The following major ways of functionalization are listed in the review papers: the most common copolymerization of CL with functionalized ε-caprolactone comonomers, block copolymerization with another monomer that can be initiated from the hydroxyl end group of PCL, and block copolymer via radical polymerization (mostly ATRP), after converting ...
Synthesis of high-molecular-weight poly(ε-caprolactone) via ...
2020年8月1日 · Here we demonstrate the heterogeneous catalysis for the ring-opening polymerization (ROP) of ε-caprolactone (ε-CL). Using a zinc-cobalt double-metal cyanide complex [Zn-Co(III) DMCC] in the presence of around 1% mol epoxides, PCLs are achieved with high number-average molecular weights ( M n s) of up to 177.7 kDa determined by the gel ...
Ring-opening polymerization of ε-caprolactone initiated by tin(II ...
The kinetics of ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) initiated by 1.0, 1.5 and 2.0 mol% of stannous(II) octoate/n-hexanol (Sn(Oct)2/n-HexOH) wase successfully studied by non-isothermal differential scanning calorimetry (DSC) at ...
Solvent-free bulk polymerization of lignin-polycaprolactone (PCL ...
2019年5月7日 · In this study, using ε-caprolactone (CL) as a reactive solvent, we successfully polymerized CL on the [OH] sites in the kraft lignin macromonomers (LM, M w = 1,520 g mol −1), which resulted in a...
Mechanism of ε-caprolactone polymerization in the presence of …
2018年10月13日 · They took part in the reaction with potassium alkoxide active centers of growing chains leading to the formation of branched poly(ε-caprolactone)s. Sodium hydride (NaH) was inactive, but in the presence of 15-crown-5 or 18-crown-6 initiated polymerization exclusively by ring opening.
ε-caprolactone ring-opening polymerization catalyzed by …
2022年1月25日 · The iron-containing imidazolium-based ionic liquid 1-n-butyl-3-methylimidazolium heptachlorodiferrate was able to efficiently catalyze the ring-opening polymerization of ε-caprolactone under mild reaction conditions. Polymerization yields higher than 80% were obtained after 4 h of reaction at temperatures up to 85 °C, using low ionic liquid ...
Synthesis of polycaprolactone: a review - RSC Publishing
Two main pathways to produce polycaprolactone have been described in the literature: the polycondensation of a hydroxycarboxylic acid: 6-hydroxyhexanoic acid, and the ring-opening polymerisation (ROP) of a lactone: ε-caprolactone (ε-CL).
Surface modification of polycaprolactone nanofibers through …
2023年6月9日 · In the present study, electrospun poly (ℇ -caprolactone) (PCL) nanofibers were modified through hydrolysis and aminolysis. The applied chemical solutions for hydrolysis and aminolysis were NaOH...
Continuous Flow Enzyme-Catalyzed Polymerization in a …
Here, we used microreactors to study enzyme-catalyzed ring-opening polymerization of ε-caprolactone to polycaprolactone. A novel microreactor design enabled us to perform these heterogeneous reactions in continuous mode, in organic media, and at elevated temperatures.