CNR ExploRA

Articolo in rivista, 2021, ENG, 10.1016/j.polymer.2021.124035

Injection vs micro-injection molding of nano-particle filled polyamide 6: Moldability and structuring

Surace R.; Pagano C.; Bellantone V.; Gatti S.; Castellani L.; Vighi M.; Stoclet G.; Sechi S.; Fassi I.; Baldi F.

STIIMA-CNR, Institute of Intelligent Industrial Systems and Technologies for Advanced Manufacturing, Consiglio Nazionale delle Ricerche, Via Lembo 38/F, Bari, I-70124, STIIMA-CNR, Institute of Intelligent Industrial Systems and Technologies for Advanced Manufacturing, Consiglio Nazionale delle Ricerche, Via Lembo 38/F, I-70124, Bari, Italy, , Italy; STIIMA-CNR, Institute of Intelligent Industrial Systems and Technologies for Advanced Manufacturing, Consiglio Nazionale delle Ricerche, Via Corti 12, Milano, I-20133, STIIMA-CNR, Institute of Intelligent Industrial Systems and Technologies for Advanced Manufacturing, Consiglio Nazionale delle Ricerche, Via Corti 12, I-20133, Milano, Italy, , Italy; Radici Novacips S.p.A. Via Provinciale 1331, Villa d'Ogna, Bergamo, I-24020, Radici Novacips S.p.A. Via Provinciale 1331, I-24020, Villa d'Ogna, Bergamo, Italy, , Italy; Versalis S.p.A. Basic Chemicals and Plastics Research Center, Via Taliercio 14, Mantova, I-46100, Versalis S.p.A. Basic Chemicals and Plastics Research Center, Via Taliercio 14, I-46100, Mantova, Italy, , Italy; Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, Lille, F-59000, Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unite Materiaux et Transformations, F-59000, Lille, France, , , , , France; Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, Lille, F-59000, Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unite Materiaux et Transformations, F-59000, Lille, France, , , , , France; Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, Lille, F-59000, Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unite Materiaux et Transformations, F-59000, Lille, France, , , , , France; Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, Lille, F-59000, Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unite Materiaux et Transformations, F-59000, Lille, France, , , , , France; Università degli Studi di Brescia, Dipartimento di Ingegneria Meccanica e Industriale, Via Branze 38, Brescia, I-25123, Universita degli Studi di Brescia, Dipartimento di Ingegneria Meccanica e Industriale, Via Branze 38, I-25123, Brescia, Italy, , Italy

In this work, the moldability via micro-injection molding (?IM) of nano-filled polyamide 6 (PA6) based systems and the microstructural characteristics of the micro-injected parts were investigated and compared to those observed via traditional injection molding (IM). Two types of nano-fillers, different in nature and geometry, were examined, namely carbon nanotubes and silicate layers. The presence of nano-fillers did not impair the mold replication capability of PA6 in the ?IM process. A micro-rib and a standard dumbbell specimen for tensile tests were used as reference micro- and macro-injected part, respectively. Transmission Electron Microscopy, Wide and Small Angle X-ray Scattering and Differential Scanning Calorimetry analyses showed that, due to the different thermomechanical histories during ?IM and IM, the micro- and the macro-parts have different microstructures, influenced also by the filler type. Both nano-filler dispersion and PA6 crystallinity were influenced.

Polymer (Guildford) 230 , pp. 1–13