Article

Dispersibility of clay and crystallization kinetics for in situ polymerized PET/pristine and modified montmorillonite nanocomposites

  1. Sung Yeon Hwang1,
  2. Wan Duk Lee1,
  3. Jung Seop Lim1,
  4. Ki Hong Park2,
  5. Seung Soon Im1,*

Article first published online: 25 APR 2008

DOI: 10.1002/polb.21435

Issue

Journal of Polymer Science Part B: Polymer Physics

Journal of Polymer Science Part B: Polymer Physics

Volume 46, Issue 11, pages 1022–1035, 1 June 2008

Additional Information

How to Cite

Hwang, S. Y., Lee, W. D., Lim, J. S., Park, K. H. and Im, S. S. (2008), Dispersibility of clay and crystallization kinetics for in situ polymerized PET/pristine and modified montmorillonite nanocomposites. Journal of Polymer Science Part B: Polymer Physics, 46: 1022–1035. doi: 10.1002/polb.21435

Author Information

  1. 1

    Department of Fiber and Polymer Engineering, College of Engineering, Hanyang University, Seongdong-Gu, Seoul 133-791, Korea

  2. 2

    Korea Polymer Testing & Research Institute, Ltd., Sangwolgok-Dong, Sungbook-Gu, Seoul 136-120, Korea

*Department of Fiber and Polymer Engineering, College of Engineering, Hanyang University, Seongdong-Gu, Seoul 133-791, Korea

Publication History

  1. Issue published online: 25 APR 2008
  2. Article first published online: 25 APR 2008
  3. Manuscript Accepted: 22 FEB 2008
  4. Manuscript Revised: 13 FEB 2008
  5. Manuscript Received: 19 NOV 2007

Funded by

  • Korea Foundation for international Cooperation of Science and Technology (KICOS)
  • Korean Ministry of Science and Technology (MOST). Grant Number: K20501000002-07-E0100-00210
  • Seoul R & D Program. Grant Number: 10919

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Keywords:

  • crystallization;
  • kinetics (polym.);
  • morphology;
  • nanocomposites;
  • organoclay;
  • polyester

Abstract

Nanocomposite materials composed of poly (ethylene terephthalate) (PET) and montmorillonite (MMT) clays were prepared by in situ polymerization. Samples consisted of PET blended with various quantities of either pristine (Na+-MMT) or organically modified MMT (A10-MMT). The morphology and thermal and mechanical properties were evaluated for each sample. TEM micrographs, acquired at a 20 nm resolution, provide direct evidence of exfoliation of the clay particles into the PET matrix and show the effect of the alkyl-modifier on clay dispersibility. The dispersion of PET/A10-MMT was greater than that observed for the PET/Na+-MMT nanocomposites. The greatest degree of exfoliation occurred for PET/A10-MMT 0.5 wt %. However, PET/Na+-MMT exhibited higher crystallization temperatures and rates suggesting that Na+-MMT is a more efficient nucleating agent. Both mechanically and thermally, PET/A10-MMT nanocomposites exhibited superior properties over pure PET. © 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 46: 1022–1035, 2008

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