Polymerization Kinetics and Physical Properties of Polyurethanes Synthesized by Bio-Based Monomers

초록

The aim of this study was to examine the kinetics of polymerization and the properties of polyurethane (PU) synthesized from renewable sources named iPU using isosorbide (ISB), cPU using caster oil (CO), and hPU using the both. The synthesis was carried out via two-step polymerization by varying the contents of CO and ISB. The reaction rate, determined by FTIR, of the bio-based monomers was slower than that of the petroleum-based monomers. The activation energy was calculated from the reaction rate under different conditions. The physicochemical, morphological, and mechanical properties were examined by attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), gel permeation chromatography (GPC), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), atomic force microscopy (AFM), and universal testing machine (UTM). The weight-average molecular weights (M-w) were in the range of 13,288 to 62,212 g mol( -1), glass transition temperature (T-g) of -30.9 to -33.3 oC, tensile strengths of 1.29 to 14.14 MPa, and elongation at breaks of 28 to 1,358%.

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