Regiocontroll synthesis cellulose-graft-polycaprolactone copolymer (2,3-di-O-PCL-cellulose) by a new route
A new and convenient route to the regiocontrolled synthesis of a cellulose-based derivate copolymer (2,3-di-O-polycaprolactone-cellulose) grafting ε-caprolactone (ε-CL) from α-cellulose, cellulose-graft-polycaprolactone (cellulose-g-PCL), by a classical ring-opening polymerization (ROP) reaction, us...
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Budapest University of Technology and Economics
2017-12-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0008395&mi=cd |
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| author | K. L. Wang N. Jiang B. B. He D. X. Kang |
| author_facet | K. L. Wang N. Jiang B. B. He D. X. Kang |
| author_sort | K. L. Wang |
| collection | DOAJ |
| description | A new and convenient route to the regiocontrolled synthesis of a cellulose-based derivate copolymer (2,3-di-O-polycaprolactone-cellulose) grafting ε-caprolactone (ε-CL) from α-cellulose, cellulose-graft-polycaprolactone (cellulose-g-PCL), by a classical ring-opening polymerization (ROP) reaction, using stannous octoate (Sn(Oct)2) as catalyst, in 68% concentration of zinc chloride aqueous solution at 120 °C was presented. By controlling the hydroxyl of cellulose/ε-CL, catalyst/monomer ratio and the reaction time, the molecular architecture of the copolymers can be altered. The solubility of cellulose in zinc chloride aqueous was indicated by UV/VIS spectrometer and rheological measurements. The structures and thermal properties of cellulose-g-polycaprolactone copolymers were characterized using Fourier Transform Infrared (FT-IR), Proton Nuclear Magnetic Resonance Spectroscopy (1H NMR), X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC) and Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). The interesting results confirm that zinc chloride solution can break the intra-molecular hydrogen bonds of cellulose selectively (not only O3H···O5, but also O2H···O6), and has no effect on the inter-molecular hydrogen bonds (O6H···O3). And the grafting reactivity of hydroxyl on cellulose is C2–OH > C3–OH >> C6–OH in zinc chloride solution, and this is clearly different from other researches. Most importantly, this work confirms that the method to regiocontrolled synthesis cellulose-based derivative polymers by regiobreaking hydrogen bonds is feasible. It is strongly believed that the new discovery may give a novel, environmental, simple and inexpensive method to modify cellulose chemically with various side chains grafted on a given hydroxyl, through liberating hydroxyl as reactive group from hydrogen bonds broken selectively by different solvents. |
| format | Article |
| id | doaj-art-307f2449db2740bc82bff497b07a2f4d |
| institution | OA Journals |
| issn | 1788-618X |
| language | English |
| publishDate | 2017-12-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-307f2449db2740bc82bff497b07a2f4d2025-08-20T02:37:29ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2017-12-011112991100210.3144/expresspolymlett.2017.94Regiocontroll synthesis cellulose-graft-polycaprolactone copolymer (2,3-di-O-PCL-cellulose) by a new routeK. L. WangN. JiangB. B. HeD. X. KangA new and convenient route to the regiocontrolled synthesis of a cellulose-based derivate copolymer (2,3-di-O-polycaprolactone-cellulose) grafting ε-caprolactone (ε-CL) from α-cellulose, cellulose-graft-polycaprolactone (cellulose-g-PCL), by a classical ring-opening polymerization (ROP) reaction, using stannous octoate (Sn(Oct)2) as catalyst, in 68% concentration of zinc chloride aqueous solution at 120 °C was presented. By controlling the hydroxyl of cellulose/ε-CL, catalyst/monomer ratio and the reaction time, the molecular architecture of the copolymers can be altered. The solubility of cellulose in zinc chloride aqueous was indicated by UV/VIS spectrometer and rheological measurements. The structures and thermal properties of cellulose-g-polycaprolactone copolymers were characterized using Fourier Transform Infrared (FT-IR), Proton Nuclear Magnetic Resonance Spectroscopy (1H NMR), X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC) and Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). The interesting results confirm that zinc chloride solution can break the intra-molecular hydrogen bonds of cellulose selectively (not only O3H···O5, but also O2H···O6), and has no effect on the inter-molecular hydrogen bonds (O6H···O3). And the grafting reactivity of hydroxyl on cellulose is C2–OH > C3–OH >> C6–OH in zinc chloride solution, and this is clearly different from other researches. Most importantly, this work confirms that the method to regiocontrolled synthesis cellulose-based derivative polymers by regiobreaking hydrogen bonds is feasible. It is strongly believed that the new discovery may give a novel, environmental, simple and inexpensive method to modify cellulose chemically with various side chains grafted on a given hydroxyl, through liberating hydroxyl as reactive group from hydrogen bonds broken selectively by different solvents.http://www.expresspolymlett.com/letolt.php?file=EPL-0008395&mi=cdPolymer synthesis, molecular e Regiocontroll synthesis polymCellulose-based derivationZinc chloride aqueousHydrogen bonds broken selectiv |
| spellingShingle | K. L. Wang N. Jiang B. B. He D. X. Kang Regiocontroll synthesis cellulose-graft-polycaprolactone copolymer (2,3-di-O-PCL-cellulose) by a new route eXPRESS Polymer Letters Polymer synthesis, molecular e Regiocontroll synthesis polym Cellulose-based derivation Zinc chloride aqueous Hydrogen bonds broken selectiv |
| title | Regiocontroll synthesis cellulose-graft-polycaprolactone copolymer (2,3-di-O-PCL-cellulose) by a new route |
| title_full | Regiocontroll synthesis cellulose-graft-polycaprolactone copolymer (2,3-di-O-PCL-cellulose) by a new route |
| title_fullStr | Regiocontroll synthesis cellulose-graft-polycaprolactone copolymer (2,3-di-O-PCL-cellulose) by a new route |
| title_full_unstemmed | Regiocontroll synthesis cellulose-graft-polycaprolactone copolymer (2,3-di-O-PCL-cellulose) by a new route |
| title_short | Regiocontroll synthesis cellulose-graft-polycaprolactone copolymer (2,3-di-O-PCL-cellulose) by a new route |
| title_sort | regiocontroll synthesis cellulose graft polycaprolactone copolymer 2 3 di o pcl cellulose by a new route |
| topic | Polymer synthesis, molecular e Regiocontroll synthesis polym Cellulose-based derivation Zinc chloride aqueous Hydrogen bonds broken selectiv |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0008395&mi=cd |
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