Alkylammonium AlPO-kanemite as support for tuning catalytic activity of metallocene: In situ preparation of polyethylene nanocomposites

•The novel supports alkylammonium aluminumphosphate kanemites were used as filler for nanocomposites.•Facile procedure to successfully anchor the metallocene catalyst on the layers.•Tunable interlayer spaces directly affects diffusion and activity of the catalytic system.•The nanocomposites were successfully synthesized by in situ polymerization of ethylene.•Layers separation by polymer growth.