탄소나노섬유가 폴리케톤의 용융결정화거동에 미치는 영향Effect of Caron Nanofiber on Melt-crystallization Behavior of Polyketone
- Other Titles
- Effect of Caron Nanofiber on Melt-crystallization Behavior of Polyketone
- Authors
- 김성혜; 박진호; 이상철; 정영규
- Issue Date
- 2016
- Publisher
- 한국섬유공학회
- Keywords
- polyketone; carbon nanofiber; isothermal melt-crystallization; avrami equation; differential scanning calorimetry
- Citation
- 한국섬유공학회지, v.53, no.4, pp 257 - 263
- Pages
- 7
- Journal Title
- 한국섬유공학회지
- Volume
- 53
- Number
- 4
- Start Page
- 257
- End Page
- 263
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/26768
- ISSN
- 1225-1089
- Abstract
- We report the influences of carbon nanofiber (CNF) on the melt-crystallization behavior and structures of polyketone (PK) composites, which were manufactured by a solution blending process. For this purpose, melt-crystallization experiments of neat PK and its composites, including 0.5 and 1.0 wt% CNFs, were carried out at different isothermal temperatures by using a differential scanning calorimeter and the results were analyzed using the Avrami equation. For all neat PK and PK/CNF composites, the Avrami index n remained unchanged, regardless of the isothermal crystallization temperatures (Tc), whereas the rate constant K and the inverse of crystallization half-time (t1/2 -1) increased noticeably with decreasing Tc’s, indicating faster melt-crystallization rates at lower Tc’s. It was further revealed that the melt-crystallization rates of PK/CNF composites were far greater than those of neat PK owing to the nucleating effect of CNF to the meltcrystallization of PK and that the composite with 1.0 wt% CNF exhibited slightly better crystallization rates, compared to the composite with 0.5 wt% CNF. Polarized optical microscopic images and X-ray diffraction patterns also support that CNF contributes to accelerate the melt-crystallization rates of PK without influencing the crystal structure of PK β-form.
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