Synthesis, characterization and thermal properties of a novel star polymer consisting of poly(ε-caprolactone) arms emanating from an octa-functional porphyrazine core

Novel poly(ε-caprolactone)s bearing amino groups: Synthesis, characterization and biotinylation

“…Among the various families of biodegradable polymers, aliphatic polyesters [3][4][5], such as poly (e-caprolactone) (PCL), poly(L-lactide) (PLA) and polyglycolide (PGA), have taken a leading position over the others because of their excellent biodegradability, biocompatibility and mechanical properties. PCL especially has been widely explored due to its distinguished properties of nontoxicity and permeability to a wide range of drugs [6,7].…”

Octa-armed star-shaped poly(ε-caprolactone)s with a phthalocyanine core by ring-opening polymerization: Synthesis and characterization

“…However, ∆H c and the corresponding X c values for 5-7 were significantly lower than those for LPCL [57]. This may be caused by the reduction of the crystallinity of the PCL arms by the Zn-Pc-based core and star architecture.…”

“…Upon excitation at 671 nm, 5-7 exhibited a fluorescence emission peak at λ = 711, 710 and 712 nm, respectively, with a Stokes shift of 0-2 nm, near the fluorescence emission peak of 4 at λ = 710 nm. It can be concluded that under the polymerization conditions in this study, the luminescence property of the phthalocyanine core is protected[36,57,58]. As in electronic spectra case, the fluorescence intensity decreased with increasing [M]/[I] ratio, probably due to the decrease of the percentage of the phthalocyanine core in the total sample solution.…”

“…1, 4 exhibited an intense broad absorption band, which corresponds to the -O-H stretching at 3315 cm −1 . Furthermore, in the IR spectra of 5-7, as a result of the polymerization with the increase of the polymer molecular weight, the intensities of the characteristic absorption peaks of the carbonyl group at around 1728 cm −1 , arising from the formation of the ester bond, increased; this increasesuggested that the polymerization of ε-CL proceeds via OH groups[57]. The characteristic vibration bands of the phthalocyanine skeleton at 1647 (-C=N-) and 1591 cm −1 (-C=C-) were also observed as weak peaks inFig.…”

Development of 3D wet-spun polymeric scaffolds loaded with antimicrobial agents for bone engineering

“…They are less crystalline and have lower melting and solution viscosity but are easier to process and degrade faster. [40][41][42][43] In this study, 3D meshes were produced by wet-spinning and evaluated as scaffolds for the regeneration of bone tissue in the presence of infections. A three-arm branched poly(e-caprolactone) (*PCL), 44,45 previously investigated by our group for the production of electrospun tissue engineering scaffolds, 46 was investigated.…”