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

被引：18
作者：
Draoua, Zohra [1 ]
Harrane, Amine [1 ]
Belbachir, Mohammed [1 ]
机构：
[1] Univ Oran, Fac Sci Exactes & Appl, Dept Chim, Lab Chim Polymeres, Oran, Algeria
来源：
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY | 2015年 / 52卷 / 02期
关键词：
poly(epsilon-caprolactone); Montmorillonite; ring opening polymerization; block copolymers; poly(ethylene glycol); Maghnite; RING-OPENING POLYMERIZATION; POLY(ETHYLENE GLYCOL); BLOCK-COPOLYMER; STABILITY;
D O I：
10.1080/10601325.2015.980763
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
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.
引用
收藏
页码：130 / 137
页数：8
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