Metal-organic frameworks (MOFs) are a novel class of materials that have shown excellent potential as a filler for lightweight polymer composites because of their low density and high specific modulus. However, the reinforcing performance of MOF particles is often weakened due to the poor interaction between the particle surface and polymer matrix. Herein, we designed a strategy to graft poly (methyl methacrylate) onto the surface of a high aspect ratio MOF (PCN-222) <i>via</i> SI-ATRP. Both IR and NMR spectroscopy showed the successful grafting of PMMA. To characterize the molecular weight (MW) of the grafted chains, we developed an efficiently approach to digest MOF and isolate the polymer. The MW was confirmed <i>via</i> SEC. Finally, we fabricated PMMA composite using PMMA-grafted PCN-222, which exhibited pronounced enhancement of Young's modulus and strength compared to pristine PCN-222 and myristic-acid functionalized PCN-222. Our results will bring insights into designing MOF-polymer composites and showcase a promising future of these novel composites.

Role of grafted polymers on mechanical reinforcement of metal-organic framework-polymer composites

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.