Abstract
Carbon dioxide based amino-alcohol compound (CO2-AA) with both alcohol and amino units in the molecular was prepared by chemical fixation of CO2 with 1, 4-butanediol diglycidyl ether and ethylenediamine, which was further used as chain extender to the preparation of waterborne polyurethanes (CO2-WPUs). Since the reacting activity of isocyanate groups in WPU prepolymer with NH2 was much faster than that with OH, hydroxyl groups could be maintained in the system and strengthen the hydrogen bonding interaction in WPU endowing the materials with some special properties. Specifically, the unique structure of CO2-AA improved mechanical, water/solvents resistance and hydrolysis/oxidation resistance properties of CO2-WPUs. Mechanical properties of the CO2-WPUs changed slightly during immersion in water, 0.25% NaOH and 6.00% H2O2 solution, while the WPUs prepared from typical chain extender ethylenediamine almost lost their mechanical properties after immersed in the solutions for 5 h. Moreover, the CO2-WPU films showed considerable thermal stability. The study suggested the novel CO2-AA might be a promising chain extender to improve the water/solvent resistance and hydrolysis/oxidation resistance of WPU.
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