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Simultaneous measurement of X-ray and tensile test under stretching of PET

Orientation-Induced Crystallization in Polymers Benjamin S. Hsiao, Stony Brook University, DMR-0098194.

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Simultaneous measurement of X-ray and tensile test under stretching of PET

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  1. Orientation-Induced Crystallization in PolymersBenjamin S. Hsiao, Stony Brook University, DMR-0098194 Molecular orientation induced by flow or deformation during polymer processing can significantly affect the crystallization kinetics and final polymer morphology. The aim of this research is to obtain an in-depth understanding of the subject in order to improve our ability to correlate the structure, morphology, process and property relationships for crystalline polymers. Here we present the deformation of poly(ethylene terephthalate), PET, an important engineering polymer with broad applications, using in-situ synchrotron X-ray diffraction method. A new insight into the relationship between the structural transformation and the mechanical property has been obtained. Macromolecules, in press (2003) Simultaneous measurement of X-ray and tensile test under stretching of PET Structural transformation between amorphous phase, mesophases (nematic and smectic C) and triclinic crystalline phase induced by stretching.

  2. Orientation-Induced Crystallization in PolymersBenjamin S. Hsiao, Stony Brook University, DMR-0098194 Education: Under this grant, two students have completed their Ph.D. degrees: Dr. Bruce Fu (post-doc at Michigan State Univ.) and Dr. Steven Zong (Wright Medical); two post-doctoral scientists have been trained: Dr. Shaofeng Ran (Stymix) and Dr. Lizhi Liu (Dow Chemical); two REU undergraduate students have also been supported: Mr. Charles Chang and Ms. Maria Yuen . Currently, two Ph.D. graduate students: Ms. Ling Yang (4th year), Mr. Jong Kahk Keum (2nd year), a senior post-doctoral scientist: Dr. Rajesh Somani, and a visiting scientist: Mr. Daisuke Kawakami (Toray) are involved in this project. Outreach: Each summer, graduate students and post-doctoral scientists have participated in the summer high school student research programs, sponsored by the Stony Brook MRSEC, Simons Foundation and the University. The picture below shows PI and several participating graduate students in 2003.

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