Journal
CARBOHYDRATE POLYMERS
Volume 92, Issue 1, Pages 751-757Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.09.093
Keywords
Cellulose nanocrystals; Polyurethane; Hard and soft segments; Atomic force microscopy; Crystallization
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Funding
- University of the Basque Country [PIFA/01/2006/045]
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Cellulose nanocrystals (CNC) successfully obtained from microcrystalline cellulose (MCC) were dispersed in a thermoplastic polyurethane as matrix. Nanocomposites containing 1.5.5. 10 and 30 wt% CNC were prepared by solvent casting procedure and properties of the resulting films were evaluated from the viewpoint of polyurethane microphase separated structure, soft and hard domains. CNC were effectively dispersed in the segmented thermoplastic elastomeric polyurethane (STPUE) matrix due to the favorable matrix-nanocrystals interactions through hydrogen bonding. Cellulose nanocrystals interacted with both soft and hard segments, enhancing stiffness and stability versus temperature of the nanocomposites. Thermal and mechanical properties of STPUE/CNC nanocomposites have been associated to the generated morphologies investigated by AFM images. (C) 2012 Elsevier Ltd. All rights reserved.
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