@Article{jpm.2026.076443,
AUTHOR = {Yifan Wang, Xishun Qiu, Chao Wu, Jiazhao Li, Chang Dai, Bowen Han, Jinhu Hu, Mingliang Ma, Ye-Tang Pan},
TITLE = {Reactive Integration of Amino-Functional 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO)-modified metal–organic frameworks (MOFs) into Polyurea Balancing Flame Retardancy and Mechanical Properties},
JOURNAL = {Journal of Polymer Materials},
VOLUME = {43},
YEAR = {2026},
NUMBER = {1},
PAGES = {--},
URL = {http://www.techscience.com/jpm/v43n1/66888},
ISSN = {0976-3449},
ABSTRACT = {Polyurea (PUA) is widely valued in protective coatings and structural reinforcement because of its impressive mechanical strength and resistance to corrosion. Its high flammability, together with the poor dispersion that often comes with simply blending in flame retardants, continues to limit its use in demanding environments. To overcome these issues, this study introduces a different approach. We grafted 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) onto the surface of a metal–organic framework (MOF) and then partially amino-functionalized the DOPO layer, ultimately creating an amino-modified DOPO–MOF hybrid. The introduced amino groups can directly react with the isocyanate (–NCO) groups in the PUA matrix, allowing the flame-retardant component to be integrated via reactive integration rather than physical blending. This approach helps avoid the interfacial defects and the mechanical weakening typically observed in conventional blending. With 5 wt% ZIF-67@DOPO-NH<sub>2</sub> added to the PUA system, the composite successfully reached a UL-94 V-0 classification and showed a notable increase in limiting oxygen index (LOI), from 19.2% to 23.8%. The peak heat release rate and total heat release dropped by 36.3% and 38.7%, respectively. Meanwhile, the tensile strength decreased from 25.74 to 22.52 MPa, while the elongation at break remained above 300%, indicating that the material maintained excellent toughness.},
DOI = {10.32604/jpm.2026.076443}
}