Kim, Jongwon Oh, Jinwoo Lee, Kyung Yeol Jung, Inhwa Park, Min 2024-01-20T01:34:33Z 2024-01-20T01:34:33Z 2021-09-01 2017-04-01 1359-8368 https://pubs.kist.re.kr/handle/201004/122865 Polyamide 66/nanocarbon (PA66/NC) composites were fabricated by dispersing various carbon nano materials, namely graphene nanoplatelets, graphene oxide, and multi-walled carbon nanotubes, into polymer matrixes via melt mixing. Various amounts and types of fillers were used with the goal of optimizing the mechanical properties of the resulting composites. Especially, Young's modulus, yield stress, tensile strength, and elongation of the various PA66/NC composites were compared. To allow precise judgments regarding increases or decreases in each of these quantities, hypothesis testing of the equality of means was performed using a one-tailed test. As mechanical properties are closely related with the dispersion of the filler within the matrix, we quantified the dispersibility by analyzing frequency distributions of light intensity transmitted through film samples. We found that a 1:1 hybrid filler of graphene oxide and multi-walled carbon nanotubes was effective for enhancing mechanical properties. The hybrid filler of graphene nanoplatelets and multi-walled carbon nanotubes was also effective for enhancing mechanical properties. By applying 1 wt% of the hybrid filler of graphene oxide and multi walled carbon nanotubes into polyamide 66, the Young's modulus increased 26.3%, yield stress increased 33.7%, and tensile strength increased 1.3% compared with that of unmixed polyamide 66. (C) 2017 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD 6 COMPOSITES NANOCOMPOSITES BEHAVIOR FATIGUE OXIDE PA66 Dispersion of graphene-based nanocarbon fillers in polyamide 66 by dry processing and its effect on mechanical properties Article 10.1016/j.compositesb.2017.01.054 1 COMPOSITES PART B-ENGINEERING, v.114, pp.445 - 456 COMPOSITES PART B-ENGINEERING 114 445 456 scie scopus 000401382600042 2-s2.0-85013846667 Engineering, Multidisciplinary Materials Science, Composites Engineering Materials Science Article 6 COMPOSITES NANOCOMPOSITES BEHAVIOR FATIGUE OXIDE PA66 Polyamide 66/nanocarbon composites Dispersibility