Feasibility of Mini-Scale Injection Molding for Resource-Efficient Screening of PP-Based Cable Insulation Nanocomposites

Ilkka Rytöluoto, Eetta Saarimäki, Jani Pelto, Mika Paajanen, Xiaozhen He, Rafal Anyszka, Amirhossein Mahtabani, Wilma Dierkes, Paolo Seri, Hadi Naderiallaf, Kari Lahti, Minna Niittymaki

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

This study presents a critical evaluation of the effect of two different sample manufacturing techniques on the morphological and dielectric properties of polypropylene (PP)-based nanocomposites, namely mini-scale injection molding (IM) vs. pilot-scale cast film extrusion. Polarized light microscopy revealed that the IM specimen morphology exhibited a layered “skin-core” type morphology, largely differing from the spherulitic morphology of the corresponding extruded cast films. Higher degree of crystallinity in the IM specimens was evidenced by calorimetric and X-ray diffraction methods. The processingdependent morphological differences were found to affect the isothermal charging current (ICC) and thermally stimulated depolarization current (TSDC) characteristics due to differences in charge mobility and trapping, thus making direct comparison of IM and cast film specimens non-straightforward. Nevertheless, mini-scale injection molding can be seen as a resource-efficient sample manufacturing method for facilitating early-stage screening of the best-performing material candidates, given that the morphological features are carefully taken into account.
Original languageEnglish
Title of host publicationProceedings of the 2020 IEEE 3rd International Conference on Dielectrics, ICD 2020
PublisherIEEE Institute of Electrical and Electronic Engineers
Pages209-212
ISBN (Electronic)978-1-7281-8983-3
ISBN (Print)978-1-7281-8984-0
DOIs
Publication statusPublished - 5 Jul 2020
MoE publication typeA4 Article in a conference publication
EventIEEE 2020 International Conference on Dielectrics, ICD 2020: Virtual Edition - Valencia, Spain
Duration: 6 Jul 202031 Jul 2020

Conference

ConferenceIEEE 2020 International Conference on Dielectrics, ICD 2020
Country/TerritorySpain
CityValencia
Period6/07/2031/07/20

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