Next Article in Journal
Two Methods for Increased Specificity and Sensitivity in Loop-Mediated Isothermal Amplification
Next Article in Special Issue
Copolymers of Vinyl-Containing Benzoxazine with Vinyl Monomers as Precursors for High Performance Thermosets
Previous Article in Journal
Nanocapsular Dispersion of Cinnamaldehyde for Enhanced Inhibitory Activity against Aflatoxin Production by Aspergillus flavus
Previous Article in Special Issue
Zinc Complexes Containing Coumarin-Derived Anilido-Aldimine Ligands as Catalysts for Ring Opening Polymerization of L-Lactide
Open AccessArticle

Ring-Opening Graft Polymerization of Propylene Carbonate onto Xylan in an Ionic Liquid

State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
Institute of New Energy and New Material, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, South China Agricultural University, Guangzhou 510642, China
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
Author to whom correspondence should be addressed.
Academic Editors: Atsushi Sudo and Takeshi Endo
Molecules 2015, 20(4), 6033-6047;
Received: 27 February 2015 / Revised: 25 March 2015 / Accepted: 2 April 2015 / Published: 7 April 2015
(This article belongs to the Special Issue Ring-Opening Polymerization)
The amidine organocatalyst 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) is an effective nucleophilic catalyst. Biocomposites with tuneable properties were successfully synthesized by ring-opening graft polymerization (ROGP) of propylene carbonate (PC) onto xylan using DBU as a catalyst in the ionic liquid (IL) 1-allyl-3-methylimidazolium chloride ([Amim]Cl). The effects of reaction temperature, reaction time and the molar ratio of PC to anhydroxylose units (AXU) in xylan were investigated. The physico-chemical properties of xylan-graft-poly(propylene carbonate) (xylan-g-PPC) copolymers were characterised by FT-IR, NMR, TGA/DTG, AFM and tensile analysis. The FT-IR and NMR results indicated the successful attachment of PPC onto xylan. TGA/DTG suggested the increased thermal stability of xylan after the attachment of PPC side chains. AFM analysis revealed details about the molecular aggregation of xylan-g-PPC films. The results also showed that with the increased DS of xylan-g-PPC copolymers, the tensile strength and Young’s modulus of the films decreased, while the elongation at break increased. View Full-Text
Keywords: xylan; propylene carbonate; DBU; ring-opening graft polymerization; ionic liquid xylan; propylene carbonate; DBU; ring-opening graft polymerization; ionic liquid
Show Figures

Graphical abstract

MDPI and ACS Style

Zhang, X.; Chen, M.; Liu, C.; Zhang, A.; Sun, R. Ring-Opening Graft Polymerization of Propylene Carbonate onto Xylan in an Ionic Liquid. Molecules 2015, 20, 6033-6047.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

Only visits after 24 November 2015 are recorded.
Back to TopTop