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Role of Chain Entanglement Network on Formation of Flow-Induced Crystallization Precursor Structure

  • Benjamin S. Hsiao
Part of the Lecture Notes in Physics book series (LNP, volume 714)

Abstract

In this article, the role of chain entanglement on the formation of flowinduced crystallization precursor structure in polymer melts was discussed. In particular, recent experimental findings from in-situ rheo-X-ray studies and ex-situ microscopic examinations were described: (1) the shish arise from the stretched chain segments in the entanglement network of the high molecular weight species; (2) the kebabs arise from the crystallization of coiled chain segments following diffusioncontrol growth; (3) multiple shish was seen in the ultra-high molecular weight polyethylene (UHMWPE) precursor; (4) the shish-kebab reformation is directly related to the relaxation behavior of stretched chain segments confined in a topologically deformed entanglement network. Based on the above results and recent simulation work from other laboratories, a modified molecular mechanism for the shish-kebab formation in entangled melt is presented.

Keywords

Shear Rate Chain Segment Entanglement Network SAXS Pattern High Molecular Weight Species 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer 2007

Authors and Affiliations

  • Benjamin S. Hsiao
    • 1
  1. 1.Department of ChemistryStony Brook UniversityUSA

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