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- W2606253676 abstract "Nowadays, green polyurethane (PU) foams are mostly synthesized by replacing an amount of petrochemical polyol with biobased polyol. Here we report five different families of isocyanate prepolymer formulations that were prepared with biobased sources and the correlation between the structure of chains and the properties of the produced PU foam. Foam behavior in tension, torsion, compression, shape memory tests and physical properties were studied by dynamic mechanical thermal analysis (DMTA); interactions in the polymer chains were analyzed by Fourier transform infrared spectroscopy (FTIR); and thermal analysis was performed by thermogravimetry (TGA) and differential scanning calorimetry (DSC). The results showed that high content of biobased macrotriol in the prepolymer formulation implies a softer final material than commercial polyester polyol foams due to the branched biobased molecules that do not allow enough packaging of the polymer matrix. Moreover, mechanical and thermal properties of the final PU foam are affected by the length, functionality and polarity of the biobased molecules used in the isocyanate prepolymer synthesis." @default.
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- W2606253676 date "2017-07-13" @default.
- W2606253676 modified "2023-10-13" @default.
- W2606253676 title "Thermal-Mechanical Characterization of Polyurethane Rigid Foams: Effect of Modifying Bio-Polyol Content in Isocyanate Prepolymers" @default.
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- W2606253676 doi "https://doi.org/10.7569/jrm.2017.634112" @default.
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