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Fibers and Polymers

, Volume 8, Issue 1, pp 43–49 | Cite as

Microstructure and mechanical properties of polyurethane/nylon/montmorillonite nanocomposite

  • Byoung Chul Chun
  • Tae Keun Cho
  • Mi Hwa Chong
  • Yong-Chan Chung
  • David Martin
  • Jihua Chen
  • Jong-Shin Park
Article

Abstract

Nanocomposite of polyurethane (PU), Nylon66 (nylon), and montmorillonite (MMT) was prepared by a twin screw extruder, and the dispersion of MMT and the mechanical properties of the nanocomposite were analyzed. Dimethyl hydrogenated tallow 2-ethylhexyl ammonium modified Cloisite 25A (C25A) and methyl tallow bis-2-hydroxyethyl ammonium modified Cloisite 30B (C30B) were used as MMT. XRD and TEM analysis indicated that the continuous melt mixing by a twin screw extruder was effective in MMT dispersion. C30B having hydroxyl group on its surface has better dispersion than C25A in the PU/nylon matrix. Maximum stress and strain at break were the maximum at 1 wt% MMT regardless of matrix composition, and decreased at higher MMT content. Best MMT dispersion was also observed at 1 wt% MMT for the entire matrix composition. Aggregation of MMT occurred at MMT content higher than 1 wt%. Nylon addition also induced the aggregation of MMT because of the high polarity of nylon surface. Dispersion of MMT was very important in improving the mechanical properties of PU/nylon nanocomposite.

Keywords

Nanocomposite Polyurethane Nylon Montmorillonite Mechanical property 

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Copyright information

© The Korean Fiber Society 2007

Authors and Affiliations

  • Byoung Chul Chun
    • 1
    • 2
  • Tae Keun Cho
    • 1
    • 2
  • Mi Hwa Chong
    • 1
    • 2
  • Yong-Chan Chung
    • 3
    • 1
    • 2
  • David Martin
    • 4
    • 1
    • 2
  • Jihua Chen
    • 4
    • 1
    • 2
  • Jong-Shin Park
    • 5
    • 1
    • 2
  1. 1.Department of Polymer EngineeringThe University of SuwonSuwonKorea
  2. 2.Intelligent Textile System Research CenterSeoulKorea
  3. 3.Department of ChemistryThe University of SuwonSuwonKorea
  4. 4.Department of Materials Science and EngineeringThe University of MichiganAnn ArborUSA
  5. 5.Department of Biosystems & Biomaterials Science and EngineeringSeoul National UniversitySeoulKorea

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