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Stephanie L. Kwolek papers

Creation: 1937-2014
Accession: 2607


Stephanie Louise Kwolek (1923-2014) was an American chemist known for inventing Kevlar. The papers of Stephanie L. Kwolek chronicle her work over a forty year span at the DuPont Company. The collection includes patents, journal articles, awards, subject files, and speeches that were either produced by or aided Kwolek in her work.


  • Creation: 1937-2014



13 Linear Feet

Historical Note

Stephanie Louise Kwolek (1923-2014) was an American chemist known for inventing Kevlar. Kwolek was born July 31, 1923 in New Kensington, Pennsylvania. She earned a bachelor’s degree in Chemistry from Margaret Morrison Carnegie College of the Carnegie Institute of Technology (now Carnegie-Mellon University). In 1946, after graduating from what is now Carnegie-Mellon University with a B.S. in Chemistry, Kwolek began her career as a research chemist at DuPont's textile fabrics laboratory in Buffalo, New York. Six years later, she was transferred to the newly built Textile Fibers Pioneering Research Laboratory at DuPont’s Experimental Station in Wilmington, Delaware. It was in Wilmington where Kwolek began researching low temperature processes for the preparation of condensation polymers. Many of these processes were eventually found in products such as Lycra, Nomex, and Kevlar.

In 1964, Kwolek was charged with searching for a new high performance fiber which unexpectedly resulted in the discovery of liquid crystalline solutions of synthetic extended-chain aromatic polyamides and their strong and stiff fibers. It was that technology which was the base of Kevlar fiber. Kwolek then began to work with other scientists to turn the fiber into a commercial product. Kevlar, which is primarily used as a composite, is five times stronger than steel on a weight basis. Kwolek was promoted to Senior Research Chemist in 1967 and a Research Associate in 1974.

By the time of her retirement from DuPont in 1986, Kwolek held sixteen patents, published thirty articles, and has been the recipient of numerous awards such as the American Chemical Society Awards for Creative Innovation (1995), DuPont Lavoisier Medal for Technical Achievement (1995), the National Medal of Technology (1996), the Perkin Medal (1997) as well as the Lemelson-MIT Lifetime Achievement Award (1999). Kwolek also held honorary doctorates from Worcester Polytechnic Institute, Clarkson University, Carnegie-Mellon University, and the University of Delaware.

Kwolek died on June 18, 2014 at the age of ninety. After a forty-year career at DuPont and because of her contributions to the safety of countless policemen across the country with the development of Kevlar, Kwolek received a posthumous honor form the City of Chicago for her contributions to safety. Today, Kevlar has over two hundred uses in ballistics, aircraft, ropes, cables, aerospace, and boating, and industrial fabrics.

Scope and Contents

The collection is divided into five series spanning the years 1937 to 2014.

Series I. Patents, 1937-1992 is divided into two separate subseries. Subseries A. contains patents issued to Kwolek while Subseries B. holds patents that were used for research and reference.

Series II. Articles and published material, 1948-2008 is further divided in five subseries. Subseries A. includes articles written by Kwolek; Subseries B. includes journal articles, abstracts and publications on topics relevant to Kwolek’s work in liquid crystalline polymers, polyesters, and polymers. Subseries C. contains scholarly articles and papers. Subseries D. relates to Kevlar publicity and publications and includes promotional literature and brochures from the DuPont Company; Subseries E. is a clipping file which is arranged chronologically.

Series III. Unpublished files, 1940-2009 is organized into three subseries which include biographical files, speeches, and subject files.

Series IV. Correspondence, 1974-2013 pertains to both Kwolek’s personal and professional life detailing her work, various awards, and fan mail.

Series V. Awards, 1960-2014 documents Kwolek’s career through the numerous accolades she received through the last fifty years of her life.

Access Restrictions

Items in this collection are subject to a twenty-five year time seal from the date of their creation.

Use Restrictions

Copyright restrictions may apply.

Related Materials

Stephanie Kwolek photographs (Accession 2014.202), Audiovisual Collections and Digital Initiatives Department, Hagley Museum and Library.

History of Kevlar oral history interviews (Accession 2014.249), Audiovisual Collections and Digital Initiatives Department, Hagley Museum and Library.

Language of Materials


Additional Description

Separated Material

Stephanie Kwolek photographs and videotapes (Accession 2014.248), Audiovisual Collections and Digital Initiatives Department, Hagley Museum and Library.

Books and published material which belonged to Stephanie Kwolek can be found in Hagley's Published Collections department.

Finding Aid & Administrative Information

Stephanie L. Kwolek papers
Andrew Engel
Description rules:
Describing Archives: A Content Standard
Language of description:
Script of description:

Repository Details

Repository Details

Part of the Manuscripts and Archives Repository

PO Box 3630
Wilmington Delaware 19807 USA