Abstract
In this study, to improve the thermo-mechanical properties of glycidyl azide polymer (GAP)-based elastomers, polyethylene adipate (PEA) with different molecular weights was successfully synthesized using a solvent-free method. GAP was synthesized by cationic ring-opening polymerization of epichlorohydrin and then azidation. The structure of PEA and GAP was characterized by FTIR, 1HNMR, and GPC. The compatibility of GAP/PEA at various weight ratio blends was investigated by differential scanning calorimetry. The result indicated GAP/PEA is compatible, and addition of PEA to GAP leads to the decrease in glass transition temperature. The copolyurethane elastomers were prepared by cross-linking GAP and PEA at various weight ratios using isophorone diisocyanate and N100 as curing agent. The thermo-mechanical properties were evaluated by dynamic mechanical analysis and tensile test. Based on the results, with increasing weight ratios of PEA, the copolyurethane elastomers displayed an increase in tensile strength (6.97 MPa) and elongation (792%) in comparison with GAP.
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