Synthetic nanoplatelets derived from R-zirconium phosphate (R-ZrP) were prepared for in situ propylene polymerization, yielding polypropylene (PP) nanocomposites. The designed R-ZrP-derivatives contain methyl groups on the surface to increase hydrophobicity, which gives rise to a better compatibility with toluene and propylene molecules. The incorporation of methyl groups on the layers of R-…