Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Crystallization Kinetics and Mechanical Properties of Poly(lactic acid)/Carbon Nanofiber Composites

폴리(락틱 엑시드)/카본 나노섬유 복합재료의 결정화 속도 및 기계적 성질

  • Park, Ji Hyun (Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Lee, Sang Cheol (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
  • 박지현 (금오공과대학교 화학소재융합학부 고분자공학전공) ;
  • 이상철 (금오공과대학교 화학소재융합학부 고분자공학전공)
  • Received : 2016.01.22
  • Accepted : 2016.02.17
  • Published : 2016.02.29
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Abstract

Poly(lactic acid) (PLA)/carbon nanofiber (CNF) composites with different CNF contents (0.5 wt% and 1 wt%) were prepared by solution blending. Isothermal crystallization of the PLA/CNF composites and the pristine PLA was investigated by differential scanning calorimetry and analyzed based on the Avrami equation. The crystallization half-times of the PLA/CNF composites were smaller than that of pristine PLA, indicating that the CNF embedded in the PLA matrix enhanced the PLA crystallization rate. Avrami exponents of the PLA/CNF composites were within the range 2.3-3.0, suggesting that a mixture of two- and three-dimensional crystals was formed by heterogeneous nucleation. Polarized optical microscopy images showed that the crystalline morphology of the PLA/CNF composites looked like small grains. Tensile tests indicated that the tensile modulus and strength of the PLA/CNF composites were higher than those of pristine PLA.

Keywords

References

  1. R. E. Drumright, P. R. Gruber, and D. E. Henton, "Polylactic Acid Technology", Adv. Mater., 2000, 12, 1841-1846. https://doi.org/10.1002/1521-4095(200012)12:23<1841::AID-ADMA1841>3.0.CO;2-E
  2. Y. Li, C. Chen, J. Li, and X. S. Sun, "Isothermal Crystallization and Melting Behaviors of Bionanocomposites from Poly(lactic acid) and $TiO_2$ Nanowires", J. Appl. Polym. Sci., 2012, 124, 2968-2977. https://doi.org/10.1002/app.35326
  3. J. Cai, M. Liu, L. Wang, K. Yao, S. Li, and H. Xiong, "Isothermal Crystallization Kinetics of Thermoplastic Starch/poly(lactic acid) Composites", Carbohyr. Polymers, 2011, 86, 941-947. https://doi.org/10.1016/j.carbpol.2011.05.044
  4. S. H. Park, S. G. Lee, and S. H. Kim, "Isothermal Crystallization Behavior and Mechanical Properties of Polylactide/carbon Nanotube Nanocomposites", Composites: Part A, 2013, 46, 11-18. https://doi.org/10.1016/j.compositesa.2012.10.011
  5. H. M. Chen, W. B. Zhang, X. C. Du, J. H. Yang, N. Zhang, T. Huang, and Y. Wang, "Crystallization Kinetics and Melting Behaviors of Poly(l-lactide)/graphene Oxides Composites", Thermochim. Acta, 2013, 566, 57-70. https://doi.org/10.1016/j.tca.2013.05.018
  6. G. G. Tibbetts, M. L. Lake, K. L. Strong, and B. P. Rice, "A Review of the Fabrication and Properties of Vapor-grown Carbon Nanofiber/polymer Composites", Compos. Sci. Technol., 2007, 67, 1709-1718. https://doi.org/10.1016/j.compscitech.2006.06.015
  7. E. Hammel, X. Tang, M. Trampert, T. Schmitt, K. Mauthner, and A. Eder, "Carbon Nanofibers for Composite Applications", Carbon, 2004, 42, 1153-1158. https://doi.org/10.1016/j.carbon.2003.12.043
  8. S. Kumar, H. Doshi, M. Srinivasarao, J. O. Park, and D. A. Schiraldi, "Fibers from Polypropylene/nano Carbon Fiber Composites", Polymer, 2002, 43, 1701-1703. https://doi.org/10.1016/S0032-3861(01)00744-3
  9. G. Sui, W. H. Zhong, M. A. Fuqua, and C. A. Ulven, "Crystalline Structure and Properties of Carbon Nanofiber Composites Prepared by Melt Extrusion", Macromol. Chem. Phys., 2007, 208, 1928-1936. https://doi.org/10.1002/macp.200700170
  10. S. Lee, J. R. Hahn, B. C. Ku, and J. Kim, "Effect of Carbon Nanofiber Structure on Crystallization Kinetics of Polypropylene/ Carbon Nanofiber Composites", Bull. Korean Chem. Soc., 2011, 32, 2369-2376. https://doi.org/10.5012/bkcs.2011.32.7.2369
  11. S. Vidhate, A. Shaito, J. Chung, and N. A. D'Souza, "Crystallization, Mechanical, and Rheological Behavior of Polyvinylidene Fluoride/Carbon Nanofiber Composites", J. Appl. Polym. Sci., 2009, 112, 254-260. https://doi.org/10.1002/app.29413
  12. M. Avrami, "Kinetics of Phase Transition. II, Transformation Time Relations", J. Chem. Phys., 1940, 8, 212-224. https://doi.org/10.1063/1.1750631
  13. S. C. Lee, K. H. Yoon, and J. H. Kim, "Crystallization Kinetics of Poly(butylenes 2,6-naphthalate) and Its Copolyesters", Polymer, 1997, 29, 1-6. https://doi.org/10.1295/polymj.29.1
  14. D. R. Dillon, K. K. Tenneti, C. Y. Li, F. K. Ko, I. Sicsb, and B. S. Hsiao, "On the Structure and Morphology of Polyvinylidene Fluoride-nanoclay Nanocomposites", Polymer, 2006, 47, 1678-1688. https://doi.org/10.1016/j.polymer.2006.01.015
  15. L. Li, C. Y. Li, C. Ni, L. Rong, and B. Hsiao, "Structure and Crystallization Behavior of Nylon 66/multi-walled Carbon Nanotube Nanocomposites at Low Carbon Nanotube Contents", Polymer, 2007, 48, 3452-3460. https://doi.org/10.1016/j.polymer.2007.04.030