Tabla de Contenidos: “…About the Special Issue Editor vii -- Preface to "Polymer Nanocomposites" . ix -- Lorenzo Massimo Polgar, Francesco Criscitiello, Machiel van Essen, Rodrigo Araya-Hermosilla, Nicola Migliore, Mattia Lenti, Patrizio Raffa, Francesco Picchioni and Andrea Pucci Thermoreversibly Cross-Linked EPM Rubber Nanocomposites with Carbon Nanotubes Reprinted from: Nanomaterials 2018, 8, 58, doi: 10.3390/nano8020058 1 -- Sithiprumnea Dul, Luca Fambri and Alessandro Pegoretti Filaments Production and Fused Deposition Modelling of ABS/Carbon Nanotubes Composites Reprinted from: Nanomaterials 2018, 8, 49, doi: 10.3390/nano8010049 19 -- Shujahadeen B. …”