naa a22 4500 510822681 CHVBK 20180411083541.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s12541-013-0156-1 doi (NATIONALLICENCE)springer-10.1007/s12541-013-0156-1 A study on the foaming ratio and optical characteristics of microcellular foamed plastics produced by a repetitive foaming process [Elektronische Daten] [Soo-hyun Cho, Sung Cha, Jung-hwan Seo, Jeonghun Ahn] Microcellular foaming technology has had a great influence on the polymer progress. According to the previous studies, polymer material has the same mechanical strength as general plastic molding products but it can have a lighter weight, and it has the features of insulation and noise suppression. In addition, it shows excellent diffused reflectivity since it has micro-sized cells. This study intends to determine the change microcellular foaming process conditions; it also intends to determine the optical characteristics, And the results of this experiment are shown through foaming ratio, diffused reflectivity, and cell morphology. We examined changes in cell morphology in the inner regions of polycarbonate (PC) samples and the resulting changes in foaming ratios. We also examined the optical characteristics that result when a repetitive foaming process is performed using polymer samples that have already undergone an initial microcellular foaming process. Polycarbonate is an amorphous material with exceptional optical characteristics. The saturation pressure was varied during both the first foaming process and the repetitive foaming process, and the results of the experiment were expressed in terms of foaming ratio, diffused reflectivity, and cell morphology. Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg, 2013 Foamed plastic nationallicence Microcellular foaming process nationallicence Repetitive foaming process nationallicence Diffused reflectivity nationallicence Cho Soo-hyun Department of Mechanical Engineering, Yonsei University, Sinchon-dong, Seodaemun-gu, 120-749, Seoul, Korea aut Cha Sung School of Mechanical Engineering, Yonsei University, Sinchon-dong, Seodaemun-gu, 120-749, Seoul, Korea aut Seo Jung-hwan Department of Mechanical Engineering, Yonsei University, Sinchon-dong, Seodaemun-gu, 120-749, Seoul, Korea aut Ahn Jeonghun Department of Mechanical Engineering, Yonsei University, Sinchon-dong, Seodaemun-gu, 120-749, Seoul, Korea aut International Journal of Precision Engineering and Manufacturing Springer Berlin Heidelberg 14/7(2013-07-01), 1147-1152 2234-7593 14:7<1147 2013 14 12541 https://doi.org/10.1007/s12541-013-0156-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12541-013-0156-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cho Soo-hyun Department of Mechanical Engineering, Yonsei University, Sinchon-dong, Seodaemun-gu, 120-749, Seoul, Korea aut NATIONALLICENCE 700 1- Cha Sung School of Mechanical Engineering, Yonsei University, Sinchon-dong, Seodaemun-gu, 120-749, Seoul, Korea aut NATIONALLICENCE 700 1- Seo Jung-hwan Department of Mechanical Engineering, Yonsei University, Sinchon-dong, Seodaemun-gu, 120-749, Seoul, Korea aut NATIONALLICENCE 700 1- Ahn Jeonghun Department of Mechanical Engineering, Yonsei University, Sinchon-dong, Seodaemun-gu, 120-749, Seoul, Korea aut NATIONALLICENCE 773 0- International Journal of Precision Engineering and Manufacturing Springer Berlin Heidelberg 14/7(2013-07-01), 1147-1152 2234-7593 14:7<1147 2013 14 12541 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer