Han, Kweon Hyung Lee, Seung Hwan Kim, Tae Seok Song, Kwang Ho Koo, Chong Min Kim, Woo Nyon 2024-01-19T15:05:39Z 2024-01-19T15:05:39Z 2021-09-04 2021-03 0379-153X https://pubs.kist.re.kr/handle/201004/117343 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 from 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. Korean POLYMER SOC KOREA ELECTRICAL-CONDUCTIVITY MICROWAVE-ABSORPTION 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 Article 10.7317/pk.2021.45.2.185 1 POLYMER-KOREA, v.45, no.2, pp.185 - 190 POLYMER-KOREA 45 2 185 190 scie scopus kci ART002695476 000631676900002 Polymer Science Polymer Science Article ELECTRICAL-CONDUCTIVITY MICROWAVE-ABSORPTION polymer composite carbon fiber electromagnetic properties electrical conductivity