Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Structure, Thermal Stability, and Mechanical Modulus of Polylactide Nanocomposites Reinforced with Organically Modified Layered Silicate

유기화 처리된 층상 실리케이트가 보강된 폴리락티드 나노복합체의 구조, 열안정성 및 기계적 탄성률

  • Kim, Il-Hwan (Department of Materials Design Engineering, Kumoh National Institute of Technology) ;
  • Jeong, Young Gyu (Department of Materials Design Engineering, Kumoh National Institute of Technology)
  • 김일환 (금오공과대학교 소재디자인공학과) ;
  • 정영규 (금오공과대학교 소재디자인공학과)
  • Received : 2012.07.04
  • Accepted : 2012.08.06
  • Published : 2012.08.31
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Abstract

We have manufactured polylactide (PLA) nanocomposites reinforced with layered silicates by the melt compounding method and have investigated their structure, thermal stability under oxygen or nitrogen atmosphere, and temperature-dependent mechanical modulus by adopting XRD, SEM, TGA, and DMA. Octadecylammonium-modified montmorillonite (organo-MMT) is used as an organically modified layered silicate and, for comparison, sodium montmorillonite (Na-MMT) is adopted as a purely inorganic layered silicate. X-ray diffraction patterns and SEM images confirm that the organo-MMT is intercalated and dispersed homogenously in the PLA matrix, whereas Na-MMT remains unchanged by forming agglomerated domains in the matrix. Unlike the PLA/Na-MMT nanocomposites, the thermal stability of PLA/organo-MMT nanocomposites is found to be substantially improved with the increment of organo-MMT content, especially under oxygen gas atmosphere. In addition, the mechanical modulus of PLA/organo-MMT nanocomposites in the glassy state are highly improved.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea

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. O. Martin and L. Averous, “Poly(lactic acid): Plasticization and Properties of Biodegradable Multiphase System”, Polymer, 2001, 42, 6209-6219. https://doi.org/10.1016/S0032-3861(01)00086-6
  3. J. Lunt, "Large-scale Production, Properties and Commercial Applications of Polylactic Acid Polymers", Polym Degrad Stabil, 1998, 59, 145-152. https://doi.org/10.1016/S0141-3910(97)00148-1
  4. H. R. Kricheldorf, I. Kreiser-Saunders, and C. Boettcher, “Polylactones: 31. Sn(II)octoate-initiated Polymerization of L-lactide: A Mechanistic Study”, Polymer, 1995, 36, 1253-1259. https://doi.org/10.1016/0032-3861(95)93928-F
  5. J.-D. Gu, M. Gada, G. Kharas, D. Eberiel, S. P. McCarty, and R. A. Gross, "Degradability of Cellulose Acetate (1.7 and 2.5, D.S) and Poly(lactide) in Simulated Composting Bioreactors", Polym Mater Sci Eng, 1992, 67, 351-352.
  6. Q. Fang and M. A. Hanna, “Rheological Properties of Amorphous and Semicrystalline Polylactic Acid Polymers”, Ind Crops Prod, 1999, 10, 47-53. https://doi.org/10.1016/S0926-6690(99)00009-6
  7. M. S. Kim and Y. H. Kim, “Synchrotron Wide Angle Xray Diffraction Analysis of Annealed PLLA Spin Draw Yarns”, Text Sci Eng, 2010, 47, 22-28.
  8. Y.-K. Kwon, W.-Y. Jung, H.-J. Son, and M. S. Khil, “A Study on the Physical Properties of Poly(lactic acid) Fabric with Different Heat Teatment Conditions”, Text Sci Eng, 2011, 48, 116-120.
  9. P. C. Lebaron, Z. Wang, and T. J. Pinnavaia, “Polymerlayered Silicate Nanocomposites: An Overview”, Appl Clay Sci, 1999, 15, 11-19. https://doi.org/10.1016/S0169-1317(99)00017-4
  10. C. T. Johnston and G. S. Premachandra, “Polarized ATRFTIR Study of Smectite in Aqueous Suspension”, Langmuir, 2001, 17, 3712-3718. https://doi.org/10.1021/la010184a
  11. E. P. Giannelis, “Polymer Layered Silicate Nanocomposites”, Adv Mater, 1996, 8, 29-35. https://doi.org/10.1002/adma.19960080104
  12. Y. H. Hyun, S. T. Lim, H. J. Choi, and M. S. Jhon, “Rheology of Poly(ethylene oxide)/organoclay Nanocomposites”, Macromolecules, 2001, 34, 8084-8093. https://doi.org/10.1021/ma002191w
  13. N. R. Shin, B. C. Kwon, K. H. Park, and H. S. Lee, “Effect of the Polymerization Methods on the Microstructure and Thermal/mechanical Properties of PU/organoclay Nanocomposites”, Text Sci Eng, 2007, 44, 1-8.
  14. P. Viville, R. Lazzaroni, E. Pollet, M. Alexandre, P. Dubios, G. Borcia, and J. J. Pireaux, “Surface Characterization of Poly(epsilon-caprolactone)-based Nanocomposites”, Langmuir, 2003, 19, 9425-9433. https://doi.org/10.1021/la034723i
  15. K. M. Lee and C. D. Han, “Rheology of Organoclay Nanocomposites: Effects of Polymer Matrix/organoclay Compatibility and the Gallery Distance of Organoclay”, Macromolecules, 2003, 36, 7165-7178. https://doi.org/10.1021/ma030302w
  16. S. S. Ray, P. Maiti, M. Okamoto, K. Yamada, and K. Ueda, "New Polylactide/layered Silicate Nanocomposites. 1. Preparation, Characterization, and Properties", Macromolecules, 2002, 35, 3104-3110. https://doi.org/10.1021/ma011613e
  17. J.-H. Chang, Y. U. An, and G. S. Sur, "Poly(lactic acid) Nanocomposites with Various Organoclays. I. Thermomechanical Properties, Morphology, and Gas Permeability", J Polym Sci, Part B: Polym Phys, 2003, 41, 94-103.
  18. P. Bordes, E. Pollet, and L. Averous, “Nano-biocomposites: Biodegradable Polyester/nanoclay Systems”, Prog Polym Sci, 2009, 34, 125-155. https://doi.org/10.1016/j.progpolymsci.2008.10.002
  19. N. Ogata, G. Jimenez, H. Kawai, and T. Ogihara, "Structure and Thermal/mechancial Properties of Poly(llactide)- clay Blend", J Polym Sci, Polym Chem, 1998, 35, 390-396.
  20. S. S. Ray, K. Yamada, M. Okamoto, and K. Ueda, "New Polylactide-layered Silicate Nanocomposites. 2. Concurrent Improvements of Material Properties, Biodegradability and Melt Rheology", Polymer, 2003, 44, 857-866. https://doi.org/10.1016/S0032-3861(02)00818-2
  21. M. Pluta, A. Galeski, M. Alexandre, and P. Dubois, “Polylactide/montmorillonite Nanocomposites and Microcomposites Prepared by Melt Blending: Structure and Some Physical Properties”, J Appl Polym Sci, 2002, 86, 1497-1506. https://doi.org/10.1002/app.11309
  22. M. A. Paul, M. Alexandre, P. Degee, C. Henrist, A. Rulmont, and P. Dubios, “New Nanocomposite Materials Based on Plasticized Poly(L-lactide) and Organo-modified Montmorillonites: Thermal and Morphological Study”, Polymer, 2003, 44, 443-450. https://doi.org/10.1016/S0032-3861(02)00778-4
  23. C. Zilg, R. Mulhaupt, and J. Finter, “Morphology and Toughness/stiffness Balance of Nanocomposites Based Upon Anhydride-cured Epoxy Resins and Layered Silicates”, Macromol Chem Phys, 1999, 200, 661-670. https://doi.org/10.1002/(SICI)1521-3935(19990301)200:3<661::AID-MACP661>3.0.CO;2-4
  24. S. H. Hsiao, G. S. Liou, and L. M. Chang, “Synthesis and Properties of Organosoluble Polyimide/clay Hybrids”, J Appl Polym Sci, 2001, 80, 2067-2072. https://doi.org/10.1002/app.1306
  25. S. S. Ray, K. Yamada, M. Okamoto, A. Ogami, and K. Ueda, “New Polylactide/Layered Silicate Nanocomposites. 3. High-Performance Biodegradable Materials”, Chem Mater, 2003, 15, 1456-1465. https://doi.org/10.1021/cm020953r