Journal
POLYMER
Volume 89, Issue -, Pages 154-158Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2016.02.057
Keywords
Polyamide 6; Carbon fiber; Transcrystalline phase
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Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan
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Carbon fiber reinforced polyamide 6 (PA6) films were fabricated in this study. A 2 microns polyamide 6 (PA6) transcrystalline layer with positive type birefringence was observed at the interphase region of PA6 and high modulus carbon fiber (HMCF) by using polarized optical microscopy, while no crystal layer was observed at that of PA6 and standard modulus carbon fiber (SMCF). HMCF exhibited higher nucleation efficacy in PA6 matrix than SMCF during cooling process, investigated by differential scanning calorimetry. The crystal form and orientation at the interphase region was further confirmed by microbeam wide angle X-ray diffraction (mu WAXD). The mu WAXD results show that alpha phase is the major crystalline fraction in PA6/HMCF and PA6/SMCF composites and the alpha crystalline percentage is slightly increase at the transcrystalline layer of PA6/HMCF composite. The mu WAXD results also suggest that the a axis of alpha crystals in the transcrystalline layer are predominantly perpendicular to the fiber direction. (C) 2016 Elsevier Ltd. All rights reserved.
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