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Article Dans Une Revue Industrial Crops and Products Année : 2018

New bio-based thermoplastic polyurethane elastomers from isosorbide and rapeseed oil derivatives

Résumé

Thermoplastic polyurethanes (TPUs) from fatty acids dimer-based polyester polyols, 4,4′-methylene bis(phenyl isocyanate) (MDI) and isosorbide (ISO) as chain extender were successfully synthesized by a two-stage synthesis. TPUs obtained from isosorbide were compared to the model 1,4-butanediol (BDO) −based materials. Differential scanning calorimetry revealed the phase-separated structure of these materials that displayed a typical thermoplastic elastomer behavior by dynamic mechanical analysis. Samples were further analyzed by transmission electronic microscopy, atomic force microscopy and compression set; hardness and water uptake were also monitored. Isosorbide was found to slightly increase the glass transition and melting temperatures of MDI-based hard segments, and to slightly decrease the stability and quality of phase segregation. This resulted in an increase in rubber modulus and hardness, shape retention, in a slight increase in the temperature of the α relaxation of the soft segment domains and in a characteristic microphase morphology. Moreover the use of the rather hydrophobic fatty acid-based soft segment allowed to keep the water uptake at a rather low level, in spite of the presence of isosorbide in the formulation.
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Dates et versions

hal-02010781 , version 1 (09-05-2019)

Identifiants

Citer

Héloïse Blache, Françoise Mechin, Alain Rousseau, Etienne Fleury, Jean-Pierre Pascault, et al.. New bio-based thermoplastic polyurethane elastomers from isosorbide and rapeseed oil derivatives. Industrial Crops and Products, 2018, 121, pp.303-312. ⟨10.1016/j.indcrop.2018.05.004⟩. ⟨hal-02010781⟩
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