Amphiphilic Biodegradable Poly(epsilon-caprolactone)-Poly(ethylene glycol) - Poly(epsilon-caprolactone) Triblock Copolymer Synthesis by Maghnite-H+ as a Green Catalyst

作者：Draoua Zohra; Harrane Amine^*; Belbachir Mohammed

来源：Journal of Macromolecular Science, Part A: Pure and Applied Chemistry , 2015, 52(2): 130-137.

DOI：10.1080/10601325.2015.980763

• poly(epsilon-caprolactone)
• Montmorillonite
• ring opening polymerization
• block copolymers
• poly(ethylene glycol)
• Maghnite

Amphiphilic biodegradable (PCL-PEG-PCL) triblock copolymers have been successfully prepared by the ring opening polymerization of epsilon-caprolactone (CL) in the presence of poly(ethylene glycol) (PEG) at 80 degrees C employing Maghnite-H+ a non-toxic Montmorillonite clay as catalyst. Maghnite-H+ reacts as a solid source of protons to induce epsilon-caprolactone polymerization. The triblock architecture, molecular weight and thermal properties of the copolymers were characterized by NMR spectra, GPC and DSC analyses. The effect of Maghnite-H+ proportion and PEGs on the rate of copolymerization and on average molecular weight of resulting copolymers was studied. A cationic mechanism for the copolymerization reaction was proposed.

• 出版日期2015-2-1