Journal
CARBOHYDRATE POLYMERS
Volume 181, Issue -, Pages 1128-1135Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.11.025
Keywords
Xylan; p-Dioxanone; Ring-opening graft polymerization; Poly(vinyl alcohol); Bio-composite films
Categories
Funding
- National Natural Science Foundation of China [31770617]
- Science and Technology Project of Guangzhou City in China [201504010033]
- National Program for Support of Top-notch Young Professionals
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To develop functional and sustainable films from xylan-based hemicelluloses, beechwood xylan was firstly modified with p-dioxanone (PDO) through ring-opening graft polymerization (ROGP) and then reinforced by poly(vinyl alcohol) (PVA) to fabricate xylan-graft-poly(p-dioxanone)/PVA (XGP/PVA) ternary composite films. FT-IR spectra proved the existence of intermolecular hydrogen bonding interactions between the hydroxyl groups of XGP and PVA. SEM analysis outlined the good compatibility between the XGP matrix and the PVA filler in blending films. From DSC data, the miscibility between XGP and PVA led to increase in the glass transition temperature (T-g) and the crystallinity (X-c) of XGP. In addition, XRD analysis also revealed the increased X-c of XGP in the presence of PVA, which was consistent with the DSC results. TGA/DTG curves indicated that the addition of PVA improved the thermal stability of XGP. Tensile testing showed a dramatic increase in the elongation at break of films with the development of weight percent gain (WPG) of XGP.
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