Abstract:The problem of poor compatibility between organic functional molecules and waterborne polyurethane systems has received widespread attention. Herein, in order to reduce the effect of spirooxazine introduction on the compatibility of polyurethane in aqueous systems, two novel spirooxazine compounds SO2 and SO4 with hydrophilic groups were synthesized and successfully introduced into waterborne polyurethanes by chemical bonding and physical blending. The results show that compared with pure waterborne polyuretha… Show more
“…After SO–OH is added to the polyurethane structure, the tensile strength increases from 15.96 MPa to 17.65 MPa, and the elongation at break decreases from 577% to 457%. Compared with the results reported by Wang et al , 41 the mechanical strength and elongation at break of the material were reduced due to the introduction of spirooxazine at both ends of the polyurethane. The introduction of the functional chain extender SO–OH prepared in this study changed the morphology of the polyurethane segment.…”
“…After SO–OH is added to the polyurethane structure, the tensile strength increases from 15.96 MPa to 17.65 MPa, and the elongation at break decreases from 577% to 457%. Compared with the results reported by Wang et al , 41 the mechanical strength and elongation at break of the material were reduced due to the introduction of spirooxazine at both ends of the polyurethane. The introduction of the functional chain extender SO–OH prepared in this study changed the morphology of the polyurethane segment.…”
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