Introduction

12/29/98


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Table of Contents

PPT Slide

Introduction

Motivation

Introduction to KevlarŪ Fibers

Internal Structure of KevlarŪ Fibers: Crystallography

Internal Structure of KevlarŪ Fibers: Supramolecular Structures

Internal Structure of KevlarŪ Fibers: Questions

Dichroic Ratio: Data Acquisition

Dichroic Ratio: Definition

X-ray Micrographs of KevlarŪ Fibers

Carbon Edge NEXAFS Spectrum

Dichroic Ratio: Results at Carbon Edge

Nitrogen Edge Data From KevlarŪ 149

Oxygen Edge Data from KevlarŪ 149

Molecular Orbital Calculations

Dichroic Ratio ? Absolute Lateral Orientation

Absolute Lateral Orientation

Conclusions

Acknowledgments

Author: Dr. Harald Ade, Physics Dept.

Email: apsmith@eos.ncsu.edu