Ellen Labrecque - Stephanie Kwolek and Bulletproof Material

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Table of Contents

Guide

Published in the United States of America by
Cherry Lake Publishing
Ann Arbor, Michigan
www.cherrylakepublishing.com

Content Adviser: Amelia Wenk Gotwals, Ph.D., Associate Professor of Science Education, Michigan State University
Reading Adviser: Marla Conn MS, Ed., Literacy specialist, Read-Ability, Inc.

Photo Credits: FeyginFoto/Shutterstock Images, cover; 1000 Words/Shutterstock Images, 4; Chemical Heritage
Foundaction, Harry Kalish/Wikimedia (Mary Mark Ockerbloom), 6; Everett Historical/Shutterstock Images, 8; AngelPet/
Shutterstock Images, 10; DuPont, 12; TLaoPhotography/Shutterstock Images, 14; NA image/Shutterstock Images, 16;
JTKPHOTO/Shutterstock Images, 18; DuPont, 20

Copyright 2017 by Cherry Lake Publishing
All rights reserved. No part of this book may be reproduced or utilized in any
form or by any means without written permission from the publisher.

Library of Congress Cataloging-in-Publication data on file.

Cherry Lake Publishing would like to acknowledge the work of The Partnership for 21st Century Skills.
Please visit www.p21.org for more information.
ISBN-13 978-1-68444-491-5 (ebook)

Printed in the United States of America
Corporate Graphics
Synchred Read-Along Version by:
Triangle Interactive LLC
PO Box 573
Prior Lake, MN 55372

CONTENTS

Police officers protect the public.

A Woman

Police officers have an important job. They
help people in emergencies. Their work can
be dangerous. Sometimes people shoot at
them. Thankfully, they can be protected by
special clothing.

Stephanie Kwolek is the scientist who
invented Kevlar . Kevlar is a bulletproof
material. It has the power to stop speeding
bullets! It is used to make helmets and vests.

Stephanie became interested in science because
she loved nature.

Stephanie Kwolek was born on July 31,
1923, in New Kensington, Pennsylvania.
Her dad, John, and mom, Nellie, were
immigrants from Poland. Stephanies mom
taught her to sew.

Stephanies dad worked in a factory. But
he loved the outdoors. He took his daughter
on many trips to explore the woods and
fields.

Think!

Kwolek said her trips into the woods made her curious! Why do
you think this is the case? Have you learned things from being in
the woods? Or from just exploring outside?

During World War II, DuPont made lifesaving
parachutes for American pilots.

Stephanie went to Carnegie Mellon
University in Pittsburgh, Pennsylvania. She
studied chemistry . She graduated in
1946. After college, she worked as a
research scientist in a laboratory . She
worked for DuPont. DuPont is a company
that invents materials for things such as
tires and parachutes .

Tires wear out. When they are no longer safe, they must be replaced.

In 1965, when Kwolek was 42, she
began working on a new material. She
wanted to invent a tough material that
would help tires last for years. Instead, she
invented a material that was even tougher
and lighter than anybody thought possible!

Create!

Pretend you could invent a new material. What would it be? For
example, would it be a special kind of blanket that never got wet?

Kevlar can be spun into fibers like these.

An Idea

Stephanie Kwolek had invented a liquid.
She put the liquid into a machine. She
spun it into a superstrong material. Kwolek
discovered that this material was five times
stronger than steel! Steel is one of the
strongest metals there is. DuPont named
it Kevlar.

Kevlar fibers can be woven into fabric.

Kwolek and a team of scientists did
many tests on Kevlar. They discovered
that Kevlar is flexible but strong. It is not
easily broken. It does not melt under hot
or cold conditions. It is also very light.

Ask Questions!

Ask your teacher or librarian about uses of Kevlar. Can they
tell you more about it? Do some research about Kevlar on
the Internet.

Many layers of Kevlar are woven and sealed together
to make a bulletproof vest.

A Legacy

Other scientists tested Kevlar. They
quickly discovered that Kwoleks invention
could be used to make bulletproof vests.
Police officers wear these vests all over the
world. To honor the lives saved by Kwoleks
invention, DuPont created a survivors club.
The club is for police officers whose lives
were saved by Kevlar. Saving their lives is

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