TY  - EJOU
AU  - Zhou, Xing 

TI  - Preparation and Characterization of Waterborne Polyurethane with Unique Nanoparticles by Controlling Water
T2  - Journal of Renewable Materials

PY  - 2022
VL  - 10
IS  - 6
SN  - 2164-6341

AB  - A facile method, focusing on emulsification, chain extension and dispersion process in preparing waterborne polyurethane, was developed to prepare emulsion with rod-like nanoparticles. The facile method involves a water addition procedure by <i>in situ</i> generated water to react with polyurethane prepolymer instead of the external water addition process. As a comparison, waterborne polyurethane was synthesized through the external water addition process. According to the characterization methods including FTIR, <sup>1</sup>H-NMR, TEM and water swelling experiments, it is suggested there are two kinds of hydrogen bonds interactions in hard/soft domain of the novel polyurethane, and the phase separation of hard/soft domains increases significantly. The morphology of the two polyurethanes was quite different (nanorods and spherical particles, respectively), presenting a different surface property. In addition, the water swelling of the novel polyurethane indicates that it holds significant potential application as degradable material.
KW  - Polyurethane; nanoparticles; coatings; degradation; swelling

DO  - 10.32604/jrm.2022.018935