Patti, Antonella (2016) Preparation and characterization of polypropylene-based systems with enhanced thermal conductivity. [Tesi di dottorato]

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Item Type: Tesi di dottorato
Lingua: English
Title: Preparation and characterization of polypropylene-based systems with enhanced thermal conductivity.
Creators:
CreatorsEmail
Patti, Antonellaantonella.patti@unina.it
Date: 31 March 2016
Number of Pages: 137
Institution: Università degli Studi di Napoli Federico II
Department: Ingegneria Chimica, dei Materiali e della Produzione Industriale
Scuola di dottorato: Ingegneria industriale
Dottorato: Ingegneria dei materiali e delle strutture
Ciclo di dottorato: 28
Coordinatore del Corso di dottorato:
nomeemail
Mensitieri, Giuseppemensitie@unina.it
Tutor:
nomeemail
Mensitieri, GiuseppeUNSPECIFIED
Acierno, DomenicoUNSPECIFIED
Russo, PietroUNSPECIFIED
Date: 31 March 2016
Number of Pages: 137
Uncontrolled Keywords: polypropylene; carbon nanotubes; thermal conductivity; dispersion; hybrid fillers
Settori scientifico-disciplinari del MIUR: Area 09 - Ingegneria industriale e dell'informazione > ING-IND/22 - Scienza e tecnologia dei materiali
Date Deposited: 12 Apr 2016 23:59
Last Modified: 27 Apr 2018 01:00
URI: http://www.fedoa.unina.it/id/eprint/10976
DOI: 10.6093/UNINA/FEDOA/10976

Abstract

In this contribution, polypropylene based-composites, containing multiwalled carbon nanotubes are prepared by melt-blending and characterized in terms of thermal conduction and dispersion (TEM, SEM, rheological test, OP, THz) but flexural and electrical characterization techniques are also considered to gain more insights about the potentials of realized systems. In details, the influence on properties of products of both two commercial polypropylene resins, different in MFI and the addition of a compatibilizer, as maleic anydryde grafted polypropylene (Ma-g-PP), is verified. Different melt-compounding and molding conditions in terms of temperature, time, screw speed, pressure, filler drying are considered to optimize them for enhanced thermal conductivity. Three different commercial MWNTs with the same aspect ratio, one neat and two chemically modified with carboxyl (–COOH) and amino (–NH2) groups, respectively, are compared to prove effects of functionalization on final properties of respective nanocomposites. Finally, melt-compounded hybrid composites, involving not functionalized carbon nanotubes (MWNT) and an additional particle, with different shape and sizes, as boron nitride (BN), zinc oxide (ZnO), calcium carbonate (CaCO3) and talc, respectively, are also taken into account to give rise to specific thermal conductive paths.

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