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


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 publication2020 IEEE International Conference on Dielectrics (ICD 2020)
PublisherIEEE Institute of Electrical and Electronic Engineers
Number of pages4
ISBN (Electronic)978-1-7281-8983-3
ISBN (Print)978-1-7281-8984-0
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


ConferenceIEEE 2020 International Conference on Dielectrics, ICD 2020

Fingerprint Dive into the research topics of 'Feasibility of Mini-Scale Injection Molding for Resource-Efficient Screening of PP-Based Cable Insulation Nanocomposites'. Together they form a unique fingerprint.

Cite this