title: New Double-Infiltration Methodology to Prepare PCL-PS Core-Shell Nanocylinders Inside Anodic Aluminum Oxide Templates.
abstract: Melt nanomolding of core-shell nanocylinders of different sizes, employing anodic aluminum oxide (AAO) templates, is reported here for the first time. The core-shell nanostructures are achieved by a new melt double-infiltration technique. During the first infiltration step, polystyrene (PS) nanotubes are produced by an adequate choice of AAO nanopore diameter size. In the second step, PCL is infiltrated inside the PS nanotubes, as its melting point (and infiltration temperature) is lower than the glass transition temperature of PS. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) measurements verified the complete double-infiltration of the polymers. Differential scanning calorimetry (DSC) experiments show that the infiltrated PCL undergoes a confined fractionated crystallization with two crystallization steps located at temperatures that depend on which surface is in contact with the PCL nanocylinders (i.e., alumina or PS). The melt double-infiltration methodology represents a novel approach to study the effect of the surrounding surface on polymer crystallization under confinement.
authors.affiliation: Instituto de Ciencia y Tecnología de Polímeros, Consejo Superior de Investigaciones Científicas (CSIC) , Juan de la Cierva 3, Madrid 28006, Spain.
authors.forename: Belén
authors.initials: B
authors.lastname: Sanz
authors.affiliation: Instituto de Ciencia y Tecnología de Polímeros, Consejo Superior de Investigaciones Científicas (CSIC) , Juan de la Cierva 3, Madrid 28006, Spain.
authors.forename: Iwona
authors.initials: I
authors.lastname: Blaszczyk-Lezak
authors.affiliation: Instituto de Ciencia y Tecnología de Polímeros, Consejo Superior de Investigaciones Científicas (CSIC) , Juan de la Cierva 3, Madrid 28006, Spain.|Donostia International Physics Center (DIPC) and Centro de Física de Materiales (CFM), CSIC-UPV , 20018 Donostia-San Sebastián, Spain.
authors.forename: Carmen
authors.initials: C
authors.lastname: Mijangos
authors.affiliation: POLYMAT and Polymer Science and Technology Department, Faculty of Chemistry, University of the Basque Country UPV/EHU , Paseo Manuel de Lardizabal 3, 20018 Donostia-San Sebastián, Spain.
authors.forename: Jordana K
authors.initials: JK
authors.lastname: Palacios
authors.affiliation: POLYMAT and Polymer Science and Technology Department, Faculty of Chemistry, University of the Basque Country UPV/EHU , Paseo Manuel de Lardizabal 3, 20018 Donostia-San Sebastián, Spain.|IKERBASQUE, Basque Foundation for Science , 48013 Bilbao, Spain.
authors.forename: Alejandro J
authors.initials: AJ
authors.lastname: Müller