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Liquid Crystalline Polymers

Committee on Liquid Crystalline Polymers, National

Materials Advisory Board

ISBN: 0-309-53660-X, 122 pages, 8.5 x 11, (1990)

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Liquid Crystalline Polymers

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NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose mem-

bers are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine.

The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance.

This report has been reviewed by a group other than the authors according to procedures approved by a Report Review Committee con-

sisting of members of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine.

The National Academy of Sciences is a private, nonprofit, self-perpetuating society of distinguished scholars engaged in scientific and

engineering research, dedicated to the furtherance of science and technology and to their use for the general welfare. Upon the authority of

the charter granted to it by the Congress in 1863, the Academy has a mandate that requires it to advise the federal government on scientific

and technical matters. Dr. Frank Press is president of the National Academy of Sciences.

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ing programs aimed at meeting national needs, encourages education and research, and recognizes the superior achievements of engineers.

Dr. Robert M. White is president of the National Academy of Engineering.

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tive, to identify issues of medical care, research, and education. Dr. Samuel O. Thier is president of the Institute of Medicine.

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are chairman and vice chairman, respectively, of the National Research Council.

********************

This study by the National Materials Advisory Board was conducted under Contract No. MDA903-89-K-0078 with the Department of

Defense and the National Aeronautics and Space Administration.

Library of Congress Catalog Card Number 90-60385.

International Standard Book Number 0-309-04231-3.

This report is available from the Defense Technical Information Center, Cameron Station, Alexandria, VA 22304-6145.

S110

Cover: Schematic arrangement of molecules in the smectic phase (top left) and the nematic phase (bottom right) of a liquid crystalline mate-

rial.

Printed in the United States of America.

First Printing, June 1990

Second Printing, September 1991

Liquid Crystalline Polymers

http://www.nap.edu/catalog/1623.html

ABSTRACT

iii

Abstract

The remarkable mechanical properties and thermal stability of fibers fabricated from liquid crystalline

polymers (LCPs) have led to the use of these materials in structural applications where weight savings are

critical. Advances in processing of LCPs could permit the incorporation of these polymers into other than

uniaxial designs and extend their utility into new areas such as nonlinear optical devices. However, the unique

feature of LCPs—intrinsic orientational order—is itself problematic, and current understanding of processing

with control of orientation falls short of allowing manipulation of macroscopic orientation (except for the case of

uniaxial fibers). This report reviews the current and desirable characteristics of LCPs and identifies specific

problems and issues that must be addressed so that advances in the use of these unique polymers can be expedited.

use the print version of this publication as the authoritative version for attribution.

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