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Title: Effect of Ethyl Ester L-Lysine Triisocyanate addition to produce reactive PLA/PCL bio-polyester blends for biomedical applications
Authors: Visco, Annamaria
Nocita, Davide
Giamporcaro, Alberto
Ronca, Sara
Forte, Giuseppe
Pistone, Alessandro
Espro, Claudia
Keywords: Bio-polyester
Poly (ε- caprolactone )
Reactive mixing
Mechanical tensile test
Wet ability
Issue Date: 2017
Publisher: © Elsevier
Citation: VISCO, A. ...et al., 2017. Effect of Ethyl Ester L-Lysine Triisocyanate addition to produce reactive PLA/PCL bio-polyester blends for biomedical applications. Journal of the Mechanical Behavior of Biomedical Materials, 68, pp. 308–317.
Abstract: We report in this paper the effects of Ethyl Ester L-Lysine Triisocyanate (LTI) on the physical-mechanical properties of Poly(lactide)/Poly(ε-caprolactone) (PLA/PCL) polyesters blends. The PLA/PCL ratios considered were 20/80, 50/50 and 80/20 (wt/wt %) and LTI was added in amounts of 0.0-0.5-1.0 phr. PLA and PCL reacted with LTI during processing in a Brabender twin screw internal mixer to produce block copolymers in-situ. The resulting blends have been characterized by torque measurements, uniaxial tensile tests, Differential Scanning Calorimeter, contact angle measurements with a Phosphate Buffered Saline (PBS) solution, ATR analysis and morphological SEM observations. Experimental results highlighted how LTI enhanced interaction and dispersion of the two components, resulting into a synergic effect in mechanical properties. Mechanical and physical properties can be tailored by changing the blend composition. The most noticeable trend was an increase in ductility of the mixed polymers. Besides, LTI decreased blend’s wet ability in PBS and lowered the starting of crystalline phase formation for both polymers, confirming an interaction among them. These reactive blends could find use as biomedical materials, e.g. absorbable suture threads or scaffolds for cellular growth.
Description: This paper was accepted for publication in the journal Journal of the Mechanical Behavior of Biomedical Materials and the definitive published version is available at http://dx.doi.org/10.1016/j.jmbbm.2017.02.018
Version: Accepted for publication
DOI: 10.1016/j.jmbbm.2017.02.018
URI: https://dspace.lboro.ac.uk/2134/24340
Publisher Link: http://dx.doi.org/10.1016/j.jmbbm.2017.02.018
ISSN: 1878-0180
Appears in Collections:Published Articles (Materials)

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