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Journal of Materials Science
Erschienen in: Journal of Materials Science 23/2014

01.12.2014 | Original Paper

Preparation and performance evaluation of castor oil-based polyurethane prepolymer/polylactide blends

verfasst von: T. Gurunathan, Smita Mohanty, Sanjay K. Nayak

Erschienen in: Journal of Materials Science | Ausgabe 23/2014

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Abstract

Polylactide (PLA) is an important biodegradable polymer, used for numerous applications ranging from industrial packaging to tissue engineering. However, its inherent brittleness and limited thermal stability have restricted its penetration to niche markets. In this communication, the authors demonstrate that blending of PLA with castor oil-based polyurethane prepolymer (COPUP), with the addition of COPUP, dispersed in the PLA matrix can overcome the inherent brittleness of the matrix polymer. NCO-terminated COPUP was successfully synthesized and subsequently mixed with variable concentration of PLA matrix using melt blending technique. The interfacial compatibilization between COPUP and PLA phase happened by the reaction of −NCO groups with terminal hydroxyl groups of PLA was confirmed by FT-IR peak deconvolution technique. As indicated by the results of DMA and DSC, the glass transition temperature (T g) of both PLA and COPUP shifted closer together, indicating that the blend compatibility increased. The tensile properties and notched Izod impact strength of the PLA and toughened PLA are also investigated. With the addition of 30 % COPUP concentration, the elongation at break of the blend reached 377.46 %, and a notched Izod impact 269.62 J m−1. With improved toughness, the PLA/COPUP blends could be used as replacements for some traditional petroleum-based polymers.
Vorheriger Artikel Preparation of an enzyme/inorganic nanosheet/magnetic bead complex and its enzymatic activity
Nächster Artikel Fabrication of graphene-encapsulated CoO/CoFe2O4 composites derived from layered double hydroxides and their application as anode materials for lithium-ion batteries

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Metadaten
Titel
Preparation and performance evaluation of castor oil-based polyurethane prepolymer/polylactide blends
verfasst von
T. Gurunathan
Smita Mohanty
Sanjay K. Nayak
Publikationsdatum
01.12.2014
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 23/2014
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-014-8509-4

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