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Books > Science & Mathematics > Chemistry > Organic chemistry > Polymer chemistry
The development of "tailormade" electrode surfaces using
electroactive polymer films has been one of the most active and
exciting areas of electrochemistry over the last 15 years. The
properties of these materials have been examined by a wide range of
scientists from a variety of perspectives, and now electroactive
polymer research is considered to be a reasonably mature area of
research endeavor. Much is now understood about the fundamental
mechanism of conduction in these materials. A wide range of
electrochemical techniques may be used to probe the conductivity
processes in these materials, and more recently, a number of in
situ spectroscopic techniques have been used to further elucidate
the structure of these materials. The in situ spectroscopies and
allied techniques have also been used to obtain correlations
between structure and redox activity. The applications found for
electroactive polymers are many and varied, and range from thin
film amperometric chemical and biological sensors, electrocatalytic
systems, drug delivery devices, and advanced battery systems
through to molecular electronic devices. The research literature on
electroactive polymers is truly enormous and can daunt even the
most hardened researcher. The vast quantity of material reported in
the literature can also intimidate beginning graduate students.
Hence the present book. The original idea for this book arose as a
result of a series of lectures on chemically modified eiectrodes
and electroactive polymers given by the writer to final-year
undergraduates at Trinity College Dublin.
Water-based technology has undergone revolutionary changes during
the past two decades. Interest in the properties and uses of
water-based coatings, paints and inks has continued to grow since
the establishment of the Clean Air Act of 1970. The present book is
devoted to recent developments and trends in water-based coating
and ink technology. This volume is divided in three broad
catagories: (1) Additives and Water-based Coating/Ink Systems, (2)
Surface Modifications and Wettability, and (3) Ink/Coating
Formulations and Their characterization. The role of various
additives to improve the performance and properties of water-based
coatings with special reference to surface phenomena such as
wettability, adhesion, surface energies, dispersion stability,
particle size and size distribution are presented in these
sections. This volume documents the proceedings of the
International symposium on Surface Phenomena and Additives in
Water-Based Coatings and Printing Technology sponsored by the 21st
Annual Meeting of the Fine Particle Society (FPS). This meeting was
held in San Diego, california, AUgust 21-25, 1990. The symposium
upon which this volume is based was organized in four sessions
emphasizing several basic and applied aspects of water-based
coatings and printing technology. Major topics discussed include
advances in water-based technology, water-based flexo and gravure
inks, hydrophobically-modified cellulosic thickeners,
organosilicones, uv curable silicone release coatings, surface
characterization of Ti02 pigments, polymer substrates, flexographic
plates and coating films, pigment wetting and dispersing agents,
hydrotrope effect in emulsion polymers, film thickness control,
particle size measurements, rheological properties, and
statistically designed mixtures for ink formulations.
This volume contains the proceedings of the 28th Europhysics
Conference on Macromolecular Physics held in Ulm, Germany, in
September 1993. The topic covers a broad scope within the field of
polymer science. In its early days, interest was focused on the
nature of the melt and of the glass transition. The latter phenomen
underwent a pronounced renewal with the advent of the mode coupling
theory, and polymers constitute only one class of substances within
this context. Consequently, this volume considers the glass
transition from different points of view. It is the aim of this
publication to demonstrate the state of the art of this evolution
by a balanced presentation of the subject that considers
experimental work, theory, and computer stimulation techniques.
Ultracentrifugation contains the proceedings of the VIII.
same-named symposium held in 1993, at Osnabruck, FRG. The volume
presents the current concepts in analytical ultracentrifugation
(AUC) including: . biochemical and biophysical applications .
characterization of polyelectrolytes, synthetic polymers, gels and
lattices . modern, fully computerized analytical ultracentrifuge
Optima XL-A . future technical developments."
After an introductory chapter, the processing, microstructure, and
properties of various ceramic materials, reinforcements, and their
composites are described. A separate chapter is devoted to
processing of ceramic reinforcements, with a special emphasis on
fibers. Processing of ceramic matrix composites is the next
chapter, which includes novel techniques such as sol-gel processing
and ceramics from polymeric precursors. The next four chapters
cover the subjects of interface region in ceramic composites,
mechanical and physical properties, and the role of thermal
stresses and the important subject of toughness enhancement.
Laminated composites made of ceramics are described in a separate
chapter. Finally, a chapter is devoted to various applications of
ceramic matrix composites. Throughout the text, the underlying
relationships between the components of the triad: processing,
microstructure, and properties are brought out. An exhaustive list
of references and suggested reading is provided.
3 In 1992 the annual world production of plastics reached 102 x
1()6m at a value of 3 over US$300 billion, while that of steel was
50 x1()6m ata value ofUS$l25 billion (Table 1. 1). Furthermore,
from 1980 to 1990, plastics production increased by 62%, while
thatofsteeldecreasedby 21%. Considering theunevenpolymerconsumption
around theworld,polymerproductionwillhave toincreasebya factor
often before currently recorded levels ofplastics sales in
developed countries willbe universally reached. Polymers are the
fastest growing structural materials. In addition, the polymer
blend segment of the plastics industry increases at a rate about
three times higher than thewhole. The aim of thisbook is to trace
the historicalevolution of the polymer blends industry. Table 1. 1
World production of steel and plastics for 1992 Production Steel
Plastics 410 102* Production volume (Mt/year) 3 Production volume
(M(m )/year) 51 102 Production value (billion US$/year) 125 310
Growth from 1980to 1990 (%) -21 -1;62 ,. 121 Mt/year in 1996 A
polymer (from the Greek poly = manyand meros = units) is a
substancecomposed ofmacromoleculesbuiltby
covalentlyjoiningatleast50 molecular segments, called mel'S. The
word polymer was introduced in 1832 by Jons Jacob Berzelius for
sub- stances
thatmayhaveidenticalchemicalcompositionbutdifferinmolecularweight
(e. g. , acetylene, benzene and styrene, having the formula CnH
with n == 2,6and 8, n respectively). During the years 1859-1863,
Louren~o reported that condensation of ethylene glycol with
ethylene dibromide resulted in a mixture of ethers, whose members,
separated by distillation, were identified as HD-(C2l4D-)n-H with n
== 2 to 6 (Stahl, 1981).
Examination of the early literature attests to the fact that the
study of copolymerization was initiated when polymer science was in
its infancy. It has continued to grow to a subject of major
importance and has been a source of interest to both academic and
industrialist alike. The wide spectrum of structures and properties
available in the statistical copolymer has made this a fruitful
field of exploration, but one particular and more restricted form
which has held its own fascination for many is the limiting case of
the strictly alternating copolymer. This is formed, in the ideal
situation, when two monomers in a reaction mixture add
consecutively to create a polymer chain with a regular {ABABAB}
structure, irrespective of the monomer feed ratio. When this
happens the resulting copolymer will always have the same
composition, a feature which can be advantageous but also somewhat
restrictive, as the ability to vary the properties is then limited.
Within a series entitled Speciality Polymers it seems appropriate
then to deal with this subject, particularly as no previous attempt
has been made to draw together the various facets of alternating
copolymerization into one volume. It also seems timely to present a
more unified picture of the subject which will also illustrate the
progress made.
The fluorine atom, by virtue of its electronegativity, size, and
bond strength with carbon, can be used to create compounds with
remarkable properties. Small molecules containing fluorine have
many positive impacts on everyday life of which blood substitutes,
pharmaceuticals, and surface modifiers are only a few examples.
Fluoropolymers, too, while traditionally associated with extreme
high performance applications have found their way into our homes,
our clothing, and even our language. A recent American president
was often likened to the tribology of PTFE. Since the serendipitous
discovery of Teflon at the DuPont Jackson Laboratory in 1938,
fluoropolymers have grown steadily in technological and marketplace
importance. New synthetic fluorine chemistry, new processes, and
new apprecia tion of the mechanisms by which fluorine imparts
exceptional properties all contribute to accelerating growth in
fluoropolymers. There are many stories of harrowing close calls in
the fluorine chemistry lab, especially from the early years, and
synthetic challenges at times remain daunting. But, fortunately,
modem techniques and facilities have enabled significant strides
toward taming both the hazards and synthetic uncertainties, In
contrast to past environmental problems associated with
fluorocarbon refrigerants, the exceptional properties of fluorine
in polymers have great environmental value. Some fluoropolymers are
enabling green technologies such as hydrogen fuel cells for
automobiles and oxygen selective membranes for cleaner diesel
combustion.
During the past fifteen years commercial interest in compounds
containing carbon fluorine bonds has burgeoned beyond all
expectations, mainly owing to business opportunities arising from
work on biologically active fluoroorganics-particularly
agrochemicals, the relentless search for new markets for
fluoropolymers and fluoro carbon fluids, developments in the field
of medical diagnostics, and the drive to find replacements for
ozone-depleting CFCs and Halon fire-extinguishing agents. Judging
the situation to warrant the publication of a comprehensive
collection of up-to-date reviews dealing with commercial
organofluorine compounds within a single volume of manageable size
(and hence reasonable cost), we were delighted to be invited by
Plenum Publishing Corporation to produce a suitable book. In order
to provide an authentic and wide-ranging account of current
commercial applications of fluoroorganic materials, it clearly was
necessary to assemble a sizeable team of knowledgeable contributing
authors selected almost entirely from industry. Through their
efforts we have been able to produce an almost complete coverage of
the modem organofluorochemicals business in a manner designed to
attract a reader ship ranging from experts in the field, through
chemists and technologists currently unaware of the extent of
industrial involvement with fluoroorganics, to students of applied
chemistry. Promised chapters dedicated to perfluoroolefin oxides
and 18F labeling of radiopharmaceuticals failed to materialize.
This is somewhat unfortunate in view of our aim to achieve
comprehensive coverage of the subject.
This important work is based on the editors' symposium at the 2005
ACS meeting in Washington, DC. The contents include an emphasis on
main-group polymers, including boron. The chapters are not simply
journal articles, but have real added value as the editors have
reviewed the general area by placing the work into a larger
perspective. This book will be required reading for scientists in a
number of disciplines including chemical engineers and physics
researchers.
Reviewing over 100 chemical and physical methods for analysis of
polymers, Manual of Plastics Analysis is so detailed and
comprehensive that chemists can apply the methods - many previously
unpublished - directly from the book. A genuine laboratory manual,
the volume supplies prodigious amounts of up-to-date information on
all types of polymers, polymer additives, volatiles, adventitious
impurities, monomers, metals, and pigments. Extremely well-suited
for classroom teaching, research, or industrial applications, the
book contains numerous tables and figures, as well as many chemical
equations illustrating its analytical techniques.
Water-soluble polymers have been attracting increasing atten tion
because of their utility in industrial applications of great
current concern. Perhaps preeminent among these is their ability to
flocculate suspended solids, e.g., wastes in municipal sew
age-treatment plants or pulp in papermaking. other important appli
cations are to aid in so-called secondary recovery of petroleum, to
reduce turbulent friction of water, and as components of
water-based finishes developed in response to environmental con
straints. Some water-soluble polymers have shown interesting bio
logic activity, which is being investigated further. This book is
based on papers presented at a symposium held by the American
Chemical Society, Division of Organic Coatings and Plastics
Chemistry, in New York City on 30-31 August 1972. The large
attendance and the favorable response of the audience con firmed
not only our view of the importance of the field but also the need
to bring these topics together. The chapters in this book are
generally enlarged and more detailed, with more complete
bibliographies, than the papers presented at the Symposium. They
include not only the important applications described above, but
also descriptions of new syntheses and characterization methods."
In this reference, the author thoroughly reviews the current state
of condensed phosphate chemistry. A unique feature of this volume
is an examination of the recent developments in X-ray structural
techniques, reporting on fundamental results obtained through their
use. Enhanced by comprehensive tables reporting crystal data,
chapters identify and characterize more than 2,000 compounds.
Additional features include a concise survey of the historical
development of condensed phosphate chemistry; the presently
accepted classification system; a review of each family of
condensed phosphates and much more.
For several years, I have been responsible for organizing and
teaching in the fall a short course on "Fundamentals of Adhesion:
Theory, Practice, and Applications" at the State University of New
York at New Paltz. Every spring I would try to assemble the most
pertinent subjects and line up several capable lecturers for the
course. However, there has always been one thing missing-an
authoritative book that covers most aspects of adhesion and
adhesive bonding. Such a book would be used by the participants as
a main reference throughout the course and kept as a sourcebook
after the course had been completed. On the other hand, this book
could not be one of those "All you want to know about" volumes,
simply because adhesion is an interdisciplinary and ever-growing
field. For the same reason, it would be very difficult for a single
individual, especially me, to undertake the task of writing such a
book. Thus, I relied on the principle that one leaves the truly
monumental jobs to experts, and I finally succeeded in asking
several leading scientists in the field of adhesion to write
separate chapters for this collection. Some chapters emphasize
theoretical concepts and others experimental techniques. In the
humble beginning, we planned to include only twelve chapters.
However, we soon realized that such a plan would leave too much
ground uncovered, and we resolved to increase the coverage. After
the book had evolved into thirty chapters, we started to feel that
perhaps our mission had been accomplished.
Dynamics of Soft Matter: Neutron Applications provides an overview
of neutron scattering techniques that measure temporal and spatial
correlations simultaneously, at the microscopic and/or mesoscopic
scale. These techniques offer answers to new questions arising at
the interface of physics, chemistry, and biology. Knowledge of the
dynamics at these levels is crucial to understanding the soft
matter field, which includes colloids, polymers, membranes,
biological macromolecules, foams, emulsions towards biological
& biomimetic systems, and phenomena involving wetting,
friction, adhesion, or microfluidics. Emphasizing the
complementarities of scattering techniques with other spectroscopic
ones, this volume also highlights the potential gain in combining
techniques such as rheology, NMR, light scattering, dielectric
spectroscopy, as well as synchrotron radiation experiments. Key
areas covered include polymer science, biological materials,
complex fluids and surface science.
This volume chronicles the proceedings of the Symposium on
Metallized Plastics: Fundamental and Applied Aspects held under the
auspices of the Dielectrics and Insulation Division of the
Electrochemical Society in Chicago, October 10-12, 1988. This was
the premier symposium on this topic and if the comments from the
attendees are any barometer of the success of a symposium then it
was a grand success. Concomitantly, it has been decided to hold it
on a regular basis (at intervals of 18 months) and the second event
in this series is planned as a part of the Electrochemical Society
meeting in Montreal, Canada, May 6-10, 1990. Metallized plastics
find a legion of applications ranging from mundane to very
sophisticated. A complete catalog of the various technological
applications of metallized plastics will be prohibitively long, so
here some eclectic examples should suffice to show why there is
such high tempo of R&D activity in the arena of metallized
plastics, and all signals indicate that this high tempo will
continue unabated. For example, polymeric films are metallized for
packaging (food and other products) purposes, and the applications
of metallized plastics in the automotive industry are quite
obvious. In the field of microelectronics and computer technology,
insulators are metallized for interconnection and other functional
purposes. Also plastics are metallized to provide electromagnetic
shielding.
This book documents the proceedings of the symposium, "Mineral
Scale Formation and Inhibition," held at the American Chemical
Society Annual Meeting August 21 to 26, 1994, in Washington, D. C.
The symposium, sponsored by the Division of Colloid and Surface
Chemistry, was held in honor of Professor George H. Nancollas for
his pioneering work in the field of crystal growth from solution. A
total of 30 papers were presented by a wide spectrum of scientists.
This book also includes papers that were not presented but were in
the symposium program. The separation of a solid by crystallization
is one of the oldest and perhaps the most frequently used
operations in chemistry. Because of its widespread applicability,
in recent years there has been considerable interest exhibited by
academic and industrial scientists in understanding the mechanisms
of crystallization of sparingly soluble salts. The salt systems of
great interest in industrial water treatment area (i. e., cooling
and boiler) include carbon ates, sulfates, phosphates, and
phosphonates of alkaline earth metals. Although not as common as
calcium carbonate and calcium sulfate, barium and strontium
sulfates have long plagued oil field and gas production operations.
The build-up of these sparingly soluble salts on equipment surfaces
results in lower heat transfer efficiency, increased corrosion
rates, increased pumping costs, etc. In the laundry application,
insoluble calcium carbonate tends to accumulate on washed fabrics
and washing equipment parts, resulting in undesirable
fabric-encrustation or scaling."
Emerging Mass Spectrometric Tools for Analysis of Polymers and
Polymer Additives, by Nina Aminlashgari and Minna Hakkarainen.
Analysis of Polymer Additives and Impurities by Liquid
Chromatography/Mass Spectrometry and Capillary Electrophoresis/Mass
Spectrometry, by Wolfgang Buchberger and Martin Stiftinger. Direct
Insertion Probe Mass Spectrometry of Polymers, by Jale Hacaloglu
Mass Spectrometric Characterization of Oligo- and Polysaccharides
and Their Derivatives, by Petra Mischnick. Electrospray
Ionization-Mass Spectrometry for Molecular Level Understanding of
Polymer Degradation, by Minna Hakkarainen.
Polymers and polymer composites have been increasingly used in
place of metals for various industries; namely, aerospace,
automotive, bio-medical, computer, electronhotograohy, fiber, and
rubber tire. Thus, an understanding of the interactions between
polymers and between a polymer and a rigid counterface can enhance
the anplications of polymers under various environments. In meet
ing this need, polymer tribology has evolved to deal with friction,
lubrication and wear of polymeric materials ann to anSwer some of
the problems related to polymer-polymer interactions or nolymer
rigid body interactions. The purpose of this first International
Symposium was to introduce advances in studies of polymer friction
and wear, especially in Britain and the U. S. S. R. Most earlier
studies of the Fifties were stimulated by the growth of rubber tire
industries. Continuous research through the Sixties has broadened
the base to include other polymers such as nylon, polyolefins, and
poly tetra fluoroethylene, or PTFE. However, much of this work was
published in engineering or physics journals and rarely in
chemistry journals: presumably, the latter have always considered
the work to be too applied or too irrelevant."
Injection moulding is one of the most important methods of
manufacturing plastics products. Through the development of
sophisticated micro processor control systems, the modern injection
moulding machine is capable of producing precision mouldings with
close tolerances in large numbers and with excellent
reproducibility. This capability, however, is often limited by the
lack of a proper appreciation of mould design. The mould, or tool
as it is often called, is at the heart of the injection moulding
process. Its basic function is to accept the plastic melt from the
injection unit and cool it to the desired shape prior to ejection.
It is not, however, simply a matter of the mould having an
impression of the shape to be moulded. Many other factors have to
be taken into account - for example, the ability to fill the mould
impression properly and efficiently without inducing weaknesses in
the moulding and the efficient cooling of the moulding in order to
maximise production rates without diminishing the quality of the
moulding. In addition, the type of mould, gate and runner system,
and ejection system which will best meet the needs of a particular
job specification have to be determined. In our experience lack of
attention to such factors leads to the mould limiting the ability
of the injection moulding machine and preventing the process as a
whole from achieving its true potential.
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