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Open AccessArticle

Effect of Temperature on the Mechanical Properties and Polymerization Kinetics of Polyamide-6 Composites

1
Center for Biomaterials, Korea Institute of Science and Technology, 5. Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Korea
2
Composites Research Division, Korea Institute of Materials Science (KIMS), 797, Changwon-daero, Seongsan-gu, Changwon-si, Gyeongsangnam-do 51508, Korea
3
School of Mechanical and Aerospace Engineering, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
4
School of Mechanical Engineering, Korea University of Technology and Education, Chungjeol-ro 1600, Byeongcheon-myeon, Dongnam-gu, Cheonan-si, Chungcheongnam-do, Cheonan 31253, Korea
5
Department of Mechanical Engineering, Nihon University, 2-chōme-1 Misakichō, Chiyoda City, Tōkyō-to 101-0061, Japan
6
Department of Mechanical System Engineering, Gyeongsang National University, 2, Tongyeonghaean-ro, Tongyeong-si, Gyeongsangnam-do 53064, Korea
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(5), 1133; https://doi.org/10.3390/polym12051133
Received: 13 April 2020 / Revised: 12 May 2020 / Accepted: 12 May 2020 / Published: 15 May 2020
(This article belongs to the Section Polymer Applications)
This work reports the preparation of carbon fiber reinforced thermoplastic composites via the in situ anionic ring opening polymerization of ε-caprolactam. Vacuum assisted resin transfer molding was used to fabricate polyamide-6/carbon fiber composites at different molding temperatures. As a result, the higher polymerization of ε-caprolactam was observed with the condition at 140 °C for satisfactory impregnation. Regarding molding temperature, the physical properties of polyamide-6/carbon fiber were observed that the bending and impact strengths at 140 °C were higher than those to at other molding temperatures. The polymerization kinetics of polyamide-6 was analyzed using differential scanning calorimetry by experimentally acquiring kinetic parameters according to model fitting approaches. Polymerization and crystallization, which occur simultaneously throughout the whole process, were separated using Gaussian and Maxwell–Boltzmann distributions to study polymerization kinetics. The result of the developed model was in good agreement with the experimental data for the presented first order autocatalytic reaction model. View Full-Text
Keywords: ε-caprolactam; vacuum assisted resin transfer molding (VARTM); differential scanning calorimeter (DSC); polymerization kinetics; crystallinity ε-caprolactam; vacuum assisted resin transfer molding (VARTM); differential scanning calorimeter (DSC); polymerization kinetics; crystallinity
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MDPI and ACS Style

Li, M.-X.; Lee, D.; Lee, G.H.; Kim, S.M.; Ben, G.; Lee, W.I.; Choi, S.W. Effect of Temperature on the Mechanical Properties and Polymerization Kinetics of Polyamide-6 Composites. Polymers 2020, 12, 1133.

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