Effects of fiber length on the reflection loss of electromagnetic wave absorbing polypropylene/carbon fiber composites prepared by injection molding and by screw extrusion process

Kweon Hyung Han, Seung Hwan Lee, Tae Seok Kim, Kwang Ho Song, Chong Min Koo, Woo Nyon Kirn

Research output: Contribution to journalArticlepeer-review

Abstract

The reflection loss (RL) performance and impedance matching characteristics of polypropylene (PP)/carbon fiber composite were studied according to two different composite preparation methods. For the PP/carbon fiber composite prepared by injection molding process, the RL value of -29.1 dB was achieved at low carbon fiber content (10 wt%), compared with the composite prepared by screw extrusion process (-15.6 dB). This good RL performance of the PP/carbon fiber composite prepared by the injection molding process was attributed to the impedance matching characteristic originating fi-om the longer fiber length in the composite, than in the composite prepared by screw extrusion. The results suggest that the carbon fiber length in the composite is an important factor to achieve PP/carbon fiber composites that have effective electromagnetic wave absorbing properties.

Original languageEnglish
Pages (from-to)185-190
Number of pages6
JournalPolymer (Korea)
Volume45
Issue number2
DOIs
Publication statusPublished - 2021 Mar

Keywords

  • Carbon fiber
  • Electrical conductivity
  • Electromagnetic properties
  • Polymer composite

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Polymers and Plastics
  • Materials Chemistry

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